Complex number calculator
There are 6 solutions, due to “The Fundamental Theorem of Algebra”. Your expression contains roots of complex numbers or powers to 1/n.
z1 = ((1 + 2i)^(1/3))*sqrt(4) = 2.439233+0.9434225i = 2.615321 × ei 0.3690496 = 2.615321 × ei 0.1174721 π Calculation steps principal root
- Complex number: 1+2i
- Divide: 1 / 3 = 1/1 · 1/3 = 1 · 1/1 · 3 = 1/3 = 0.33333333
The first operand is an integer. It is equivalent to a fraction 1/1. Dividing two fractions is the same as multiplying the first fraction by the reciprocal value of the second fraction. The first sub-step is to find the reciprocal (reverse the numerator and denominator, reciprocal of 3/1 is 1/3) of the second fraction. Next, multiply the two numerators. Then, multiply the two denominators. In the following intermediate step, it cannot further simplify the fraction result by canceling.
In other words, one divided by three equals one third. - Cube root: ∛(the result of step No. 1) = ∛(1+2i) = 1.2196165+0.4717113i
- Square root: sqrt(4) = √ 4 = 2
- Multiple: the result of step No. 3 * the result of step No. 4 = (1.2196165+0.4717113i) * 2 = 2.439233+0.9434225i
The result z1
Rectangular form (standard form):
z = 2.439233+0.9434225i
Angle notation (phasor, module and argument):
z = 2.615321 ∠ 21°8'42″
Polar form:
z = 2.615321 × (cos 21°8'42″ + i sin 21°8'42″)
Exponential form:
z = 2.615321 × ei 0.3690496 = 2.615321 × ei 0.1174721 π
Polar coordinates:
r = |z| = 2.615321 ... magnitude (modulus, absolute value)
θ = arg z = 0.3690496 rad = 21.14498° = 21°8'42″ = 0.1174721π rad ... angle (argument or phase)
Cartesian coordinates:
Cartesian form of imaginary number: z = 2.439233+0.9434225i
Real part: x = Re z = 2.439
Imaginary part: y = Im z = 0.94342254
z = 2.439233+0.9434225i
Angle notation (phasor, module and argument):
z = 2.615321 ∠ 21°8'42″
Polar form:
z = 2.615321 × (cos 21°8'42″ + i sin 21°8'42″)
Exponential form:
z = 2.615321 × ei 0.3690496 = 2.615321 × ei 0.1174721 π
Polar coordinates:
r = |z| = 2.615321 ... magnitude (modulus, absolute value)
θ = arg z = 0.3690496 rad = 21.14498° = 21°8'42″ = 0.1174721π rad ... angle (argument or phase)
Cartesian coordinates:
Cartesian form of imaginary number: z = 2.439233+0.9434225i
Real part: x = Re z = 2.439
Imaginary part: y = Im z = 0.94342254
z2 = ((1 + 2i)^(1/3))*sqrt(4) = -2.0366444+1.6407265i = 2.615321 × ei 2.4634447 = 2.615321 × ei 0.7841388 π Calculation steps
- Complex number: 1+2i
- Divide: 1 / 3 = 1/1 · 1/3 = 1 · 1/1 · 3 = 1/3 = 0.33333333
The first operand is an integer. It is equivalent to a fraction 1/1. Dividing two fractions is the same as multiplying the first fraction by the reciprocal value of the second fraction. The first sub-step is to find the reciprocal (reverse the numerator and denominator, reciprocal of 3/1 is 1/3) of the second fraction. Next, multiply the two numerators. Then, multiply the two denominators. In the following intermediate step, it cannot further simplify the fraction result by canceling.
In other words, one divided by three equals one third. - Cube root: ∛(the result of step No. 1) = ∛(1+2i) = -1.0183222+0.8203632i
- Square root: sqrt(4) = √ 4 = 2
- Multiple: the result of step No. 3 * the result of step No. 4 = (-1.0183222+0.8203632i) * 2 = -2.0366444+1.6407265i
The result z2
Rectangular form (standard form):
z = -2.0366444+1.6407265i
Angle notation (phasor, module and argument):
z = 2.615321 ∠ 141°8'42″
Polar form:
z = 2.615321 × (cos 141°8'42″ + i sin 141°8'42″)
Exponential form:
z = 2.615321 × ei 2.4634447 = 2.615321 × ei 0.7841388 π
Polar coordinates:
r = |z| = 2.615321 ... magnitude (modulus, absolute value)
θ = arg z = 2.4634447 rad = 141.14498° = 141°8'42″ = 0.7841388π rad ... angle (argument or phase)
Cartesian coordinates:
Cartesian form of imaginary number: z = -2.0366444+1.6407265i
Real part: x = Re z = -2.037
Imaginary part: y = Im z = 1.6407265
z = -2.0366444+1.6407265i
Angle notation (phasor, module and argument):
z = 2.615321 ∠ 141°8'42″
Polar form:
z = 2.615321 × (cos 141°8'42″ + i sin 141°8'42″)
Exponential form:
z = 2.615321 × ei 2.4634447 = 2.615321 × ei 0.7841388 π
Polar coordinates:
r = |z| = 2.615321 ... magnitude (modulus, absolute value)
θ = arg z = 2.4634447 rad = 141.14498° = 141°8'42″ = 0.7841388π rad ... angle (argument or phase)
Cartesian coordinates:
Cartesian form of imaginary number: z = -2.0366444+1.6407265i
Real part: x = Re z = -2.037
Imaginary part: y = Im z = 1.6407265
z3 = ((1 + 2i)^(1/3))*sqrt(4) = -0.4025886-2.584149i = 2.615321 × ei -1.7253455 = 2.615321 × ei (-0.5491945) π Calculation steps
- Complex number: 1+2i
- Divide: 1 / 3 = 1/1 · 1/3 = 1 · 1/1 · 3 = 1/3 = 0.33333333
The first operand is an integer. It is equivalent to a fraction 1/1. Dividing two fractions is the same as multiplying the first fraction by the reciprocal value of the second fraction. The first sub-step is to find the reciprocal (reverse the numerator and denominator, reciprocal of 3/1 is 1/3) of the second fraction. Next, multiply the two numerators. Then, multiply the two denominators. In the following intermediate step, it cannot further simplify the fraction result by canceling.
In other words, one divided by three equals one third. - Cube root: ∛(the result of step No. 1) = ∛(1+2i) = -0.2012943-1.2920745i
- Square root: sqrt(4) = √ 4 = 2
- Multiple: the result of step No. 3 * the result of step No. 4 = (-0.2012943-1.2920745i) * 2 = -0.4025886-2.584149i
The result z3
Rectangular form (standard form):
z = -0.4025886-2.584149i
Angle notation (phasor, module and argument):
z = 2.615321 ∠ -98°51'18″
Polar form:
z = 2.615321 × (cos (-98°51'18″) + i sin (-98°51'18″))
Exponential form:
z = 2.615321 × ei -1.7253455 = 2.615321 × ei (-0.5491945) π
Polar coordinates:
r = |z| = 2.615321 ... magnitude (modulus, absolute value)
θ = arg z = -1.7253455 rad = -98.85502° = -98°51'18″ = -0.5491945π rad ... angle (argument or phase)
Cartesian coordinates:
Cartesian form of imaginary number: z = -0.4025886-2.584149i
Real part: x = Re z = -0.403
Imaginary part: y = Im z = -2.58414903
z = -0.4025886-2.584149i
Angle notation (phasor, module and argument):
z = 2.615321 ∠ -98°51'18″
Polar form:
z = 2.615321 × (cos (-98°51'18″) + i sin (-98°51'18″))
Exponential form:
z = 2.615321 × ei -1.7253455 = 2.615321 × ei (-0.5491945) π
Polar coordinates:
r = |z| = 2.615321 ... magnitude (modulus, absolute value)
θ = arg z = -1.7253455 rad = -98.85502° = -98°51'18″ = -0.5491945π rad ... angle (argument or phase)
Cartesian coordinates:
Cartesian form of imaginary number: z = -0.4025886-2.584149i
Real part: x = Re z = -0.403
Imaginary part: y = Im z = -2.58414903
z4 = ((1 + 2i)^(1/3))*sqrt(4) = -2.439233-0.9434225i = 2.615321 × ei -2.7725431 = 2.615321 × ei (-0.8825279) π Calculation steps
- Complex number: 1+2i
- Divide: 1 / 3 = 1/1 · 1/3 = 1 · 1/1 · 3 = 1/3 = 0.33333333
The first operand is an integer. It is equivalent to a fraction 1/1. Dividing two fractions is the same as multiplying the first fraction by the reciprocal value of the second fraction. The first sub-step is to find the reciprocal (reverse the numerator and denominator, reciprocal of 3/1 is 1/3) of the second fraction. Next, multiply the two numerators. Then, multiply the two denominators. In the following intermediate step, it cannot further simplify the fraction result by canceling.
In other words, one divided by three equals one third. - Cube root: ∛(the result of step No. 1) = ∛(1+2i) = 1.2196165+0.4717113i
- Square root: sqrt(4) = √ 4 = -2
- Multiple: the result of step No. 3 * the result of step No. 4 = (1.2196165+0.4717113i) * (-2) = -2.439233-0.9434225i
The result z4
Rectangular form (standard form):
z = -2.439233-0.9434225i
Angle notation (phasor, module and argument):
z = 2.615321 ∠ -158°51'18″
Polar form:
z = 2.615321 × (cos (-158°51'18″) + i sin (-158°51'18″))
Exponential form:
z = 2.615321 × ei -2.7725431 = 2.615321 × ei (-0.8825279) π
Polar coordinates:
r = |z| = 2.615321 ... magnitude (modulus, absolute value)
θ = arg z = -2.7725431 rad = -158.85502° = -158°51'18″ = -0.8825279π rad ... angle (argument or phase)
Cartesian coordinates:
Cartesian form of imaginary number: z = -2.439233-0.9434225i
Real part: x = Re z = -2.439
Imaginary part: y = Im z = -0.94342254
z = -2.439233-0.9434225i
Angle notation (phasor, module and argument):
z = 2.615321 ∠ -158°51'18″
Polar form:
z = 2.615321 × (cos (-158°51'18″) + i sin (-158°51'18″))
Exponential form:
z = 2.615321 × ei -2.7725431 = 2.615321 × ei (-0.8825279) π
Polar coordinates:
r = |z| = 2.615321 ... magnitude (modulus, absolute value)
θ = arg z = -2.7725431 rad = -158.85502° = -158°51'18″ = -0.8825279π rad ... angle (argument or phase)
Cartesian coordinates:
Cartesian form of imaginary number: z = -2.439233-0.9434225i
Real part: x = Re z = -2.439
Imaginary part: y = Im z = -0.94342254
z5 = ((1 + 2i)^(1/3))*sqrt(4) = 2.0366444-1.6407265i = 2.615321 × ei -0.678148 = 2.615321 × ei (-0.2158612) π Calculation steps
- Complex number: 1+2i
- Divide: 1 / 3 = 1/1 · 1/3 = 1 · 1/1 · 3 = 1/3 = 0.33333333
The first operand is an integer. It is equivalent to a fraction 1/1. Dividing two fractions is the same as multiplying the first fraction by the reciprocal value of the second fraction. The first sub-step is to find the reciprocal (reverse the numerator and denominator, reciprocal of 3/1 is 1/3) of the second fraction. Next, multiply the two numerators. Then, multiply the two denominators. In the following intermediate step, it cannot further simplify the fraction result by canceling.
In other words, one divided by three equals one third. - Cube root: ∛(the result of step No. 1) = ∛(1+2i) = -1.0183222+0.8203632i
- Square root: sqrt(4) = √ 4 = -2
- Multiple: the result of step No. 3 * the result of step No. 4 = (-1.0183222+0.8203632i) * (-2) = 2.0366444-1.6407265i
The result z5
Rectangular form (standard form):
z = 2.0366444-1.6407265i
Angle notation (phasor, module and argument):
z = 2.615321 ∠ -38°51'18″
Polar form:
z = 2.615321 × (cos (-38°51'18″) + i sin (-38°51'18″))
Exponential form:
z = 2.615321 × ei -0.678148 = 2.615321 × ei (-0.2158612) π
Polar coordinates:
r = |z| = 2.615321 ... magnitude (modulus, absolute value)
θ = arg z = -0.678148 rad = -38.85502° = -38°51'18″ = -0.2158612π rad ... angle (argument or phase)
Cartesian coordinates:
Cartesian form of imaginary number: z = 2.0366444-1.6407265i
Real part: x = Re z = 2.037
Imaginary part: y = Im z = -1.6407265
z = 2.0366444-1.6407265i
Angle notation (phasor, module and argument):
z = 2.615321 ∠ -38°51'18″
Polar form:
z = 2.615321 × (cos (-38°51'18″) + i sin (-38°51'18″))
Exponential form:
z = 2.615321 × ei -0.678148 = 2.615321 × ei (-0.2158612) π
Polar coordinates:
r = |z| = 2.615321 ... magnitude (modulus, absolute value)
θ = arg z = -0.678148 rad = -38.85502° = -38°51'18″ = -0.2158612π rad ... angle (argument or phase)
Cartesian coordinates:
Cartesian form of imaginary number: z = 2.0366444-1.6407265i
Real part: x = Re z = 2.037
Imaginary part: y = Im z = -1.6407265
z6 = ((1 + 2i)^(1/3))*sqrt(4) = 0.4025886+2.584149i = 2.615321 × ei 1.4162471 = 2.615321 × ei 0.4508055 π Calculation steps
- Complex number: 1+2i
- Divide: 1 / 3 = 1/1 · 1/3 = 1 · 1/1 · 3 = 1/3 = 0.33333333
The first operand is an integer. It is equivalent to a fraction 1/1. Dividing two fractions is the same as multiplying the first fraction by the reciprocal value of the second fraction. The first sub-step is to find the reciprocal (reverse the numerator and denominator, reciprocal of 3/1 is 1/3) of the second fraction. Next, multiply the two numerators. Then, multiply the two denominators. In the following intermediate step, it cannot further simplify the fraction result by canceling.
In other words, one divided by three equals one third. - Cube root: ∛(the result of step No. 1) = ∛(1+2i) = -0.2012943-1.2920745i
- Square root: sqrt(4) = √ 4 = -2
- Multiple: the result of step No. 3 * the result of step No. 4 = (-0.2012943-1.2920745i) * (-2) = 0.4025886+2.584149i
The result z6
Rectangular form (standard form):
z = 0.4025886+2.584149i
Angle notation (phasor, module and argument):
z = 2.615321 ∠ 81°8'42″
Polar form:
z = 2.615321 × (cos 81°8'42″ + i sin 81°8'42″)
Exponential form:
z = 2.615321 × ei 1.4162471 = 2.615321 × ei 0.4508055 π
Polar coordinates:
r = |z| = 2.615321 ... magnitude (modulus, absolute value)
θ = arg z = 1.4162471 rad = 81.14498° = 81°8'42″ = 0.4508055π rad ... angle (argument or phase)
Cartesian coordinates:
Cartesian form of imaginary number: z = 0.4025886+2.584149i
Real part: x = Re z = 0.403
Imaginary part: y = Im z = 2.58414903
z = 0.4025886+2.584149i
Angle notation (phasor, module and argument):
z = 2.615321 ∠ 81°8'42″
Polar form:
z = 2.615321 × (cos 81°8'42″ + i sin 81°8'42″)
Exponential form:
z = 2.615321 × ei 1.4162471 = 2.615321 × ei 0.4508055 π
Polar coordinates:
r = |z| = 2.615321 ... magnitude (modulus, absolute value)
θ = arg z = 1.4162471 rad = 81.14498° = 81°8'42″ = 0.4508055π rad ... angle (argument or phase)
Cartesian coordinates:
Cartesian form of imaginary number: z = 0.4025886+2.584149i
Real part: x = Re z = 0.403
Imaginary part: y = Im z = 2.58414903
This calculator supports all operations with complex numbers and evaluates expressions in the complex number system.
You can use i (mathematics) or j (electrical engineering) as the imaginary unit, both satisfying the fundamental property i2 = −1 or j2 = −1.
Additionally, the calculator can convert complex numbers into:
Additionally, the calculator can convert complex numbers into:
- Angle notation (phasor notation)
- Exponential form
- Polar coordinates (magnitude and angle)
Complex numbers in the angle notation or phasor (polar coordinates r, θ) may you write as rLθ where r is magnitude/amplitude/radius, and θ is the angle (phase) in degrees, for example, 5L65 which is the same as 5*cis(65°).
Example of multiplication of two imaginary numbers in the angle/polar/phasor notation: 10L45 * 3L90.
For use in education (for example, calculations of alternating currents at high school), you need a quick and precise complex number calculator.
Example of multiplication of two imaginary numbers in the angle/polar/phasor notation: 10L45 * 3L90.
For use in education (for example, calculations of alternating currents at high school), you need a quick and precise complex number calculator.
Basic operations with complex numbers
We hope that working with the complex number is quite easy because you can work with imaginary unit i as a variable. And use the definition i2 = -1 to simplify complex expressions. Many operations are the same as operations with two-dimensional vectors.Addition
It is very simple: add up the real parts (without i) and add up the imaginary parts (with i):This is equal to use rule: (a+bi)+(c+di) = (a+c) + (b+d)i
(1+i) + (6-5i) = 7-4i
12 + 6-5i = 18-5i
(10-5i) + (-5+5i) = 5
Subtraction
Again it is very simple: subtract the real parts and subtract the imaginary parts (with i):This is equal to use rule: (a+bi)+(c+di) = (a-c) + (b-d)i
(1+i) - (3-5i) = -2+6i
-1/2 - (6-5i) = -6.5+5i
(10-5i) - (-5+5i) = 15-10i
Multiplication
To multiply two complex numbers, use distributive law, avoid binomials, and apply i2 = -1.This is equal to use rule: (a+bi)(c+di) = (ac-bd) + (ad+bc)i
(1+i) (3+5i) = 1*3+1*5i+i*3+i*5i = 3+5i+3i-5 = -2+8i
-1/2 * (6-5i) = -3+2.5i
(10-5i) * (-5+5i) = -25+75i
Division
The division of two complex numbers can be accomplished by multiplying the numerator and denominator by the denominator's complex conjugate. This approach avoids imaginary unit i from the denominator. If the denominator is c+di, to make it without i (or make it real), multiply with conjugate c-di:(c+di)(c-di) = c2+d2
c+dia+bi=(c+di)(c−di)(a+bi)(c−di)=c2+d2ac+bd+i(bc−ad)=c2+d2ac+bd+c2+d2bc−adi
(10-5i) / (1+i) = 2.5-7.5i
-3 / (2-i) = -1.2-0.6i
6i / (4+3i) = 0.72+0.96i
Absolute value or modulus
The absolute value or modulus is the distance of the image of a complex number from the origin in the plane. The calculator uses the Pythagorean theorem to find this distance. Very simple, see examples: |3+4i| = 5|1-i| = 1.4142136
|6i| = 6
abs(2+5i) = 5.3851648
Square root
The square root of a complex number (a+bi) is z, if z2 = (a+bi). Here ends simplicity. Because of the fundamental theorem of algebra, you will always have two different square roots for a given number. If you want to find out the possible values, the easiest way is to use De Moivre's formula. Our calculator is on edge because the square root is not a well-defined function on a complex number. We calculate all complex roots from any number - even in expressions:sqrt(9i) = 2.1213203+2.1213203i
sqrt(10-6i) = 3.2910412-0.9115656i
pow(-32,1/5)/5 = -0.4
pow(1+2i,1/3)*sqrt(4) = 2.439233+0.9434225i
pow(-5i,1/8)*pow(8,1/3) = 2.3986959-0.4771303i
Square, power, complex exponentiation
Our calculator can power any complex number to an integer (positive, negative), real, or even complex number. In other words, we calculate 'complex number to a complex power' or 'complex number raised to a power'...Famous example:
ii=e−π/2
i^2 = -1i^61 = i
(6-2i)^6 = -22528-59904i
(6-i)^4.5 = 2486.1377428-2284.5557378i
(6-5i)^(-3+32i) = 2929449.0399425-9022199.5826224i
i^i = 0.2078795764
pow(1+i,3) = -2+2i
Functions
- sqrt
- Square Root of a value or expression.
- sin
- the sine of a value or expression. Autodetect radians/degrees.
- cos
- the cosine of a value or expression. Autodetect radians/degrees.
- tan
- tangent of a value or expression. Autodetect radians/degrees.
- exp
- e (the Euler Constant) raised to the power of a value or expression
- pow
- Power one complex number to another integer/real/complex number
- ln
- The natural logarithm of a value or expression
- log
- The base-10 logarithm of a value or expression
- abs or |1+i|
- The absolute value of a value or expression
- phase
- Phase (angle) of a complex number
- cis
- is less known notation: cis(x) = cos(x)+ i sin(x); example: cis (pi/2) + 3 = 3+i
- conj
- the conjugate of a complex number - example: conj(4i+5) = 5-4i
Examples:
• cube root: cuberoot(1 - 27i)• roots of Complex Numbers: pow(1 + i,1/7)
• phase, complex number angle: phase(1 + i)
• cis form complex numbers: 5 * cis(45°)
• The polar form of complex numbers: 10L60
• complex conjugate calculator: conj(4 + 5i)
• equation with complex numbers: (z + i/2 )/(1 - i) = 4z + 5i
• system of equations with imaginary numbers: x - y = 4 + 6i; 3ix + 7y=x + iy
• De Moivre's theorem - equation: z ^ 4=1
• multiplication of three complex numbers: (1 + 3i)(3 + 4i)(−5 + 3i)
• Find the product of 3-4i and its conjugate.: (3 - 4i) * conj(3 - 4i)
• operations with complex numbers: (3 - i) ^ 3
Complex numbers in word problems:
- De Moivre's formula
There are two distinct complex numbers, such that z³ is equal to 1 and z is not equal to 1. Calculate the sum of these two numbers.
- Complex roots
Find the sum of the fourth square root of the number 16.
- Equation: 3726
Determine the real root of the equation: x-3: x-8 = 32
- Fifth 3871
What is the sum of the fifth root of 243?
- Cplx sixth power
Let z = 2 - sqrt(3i). Find z6 and express your answer in rectangular form. if z = 2 - 2sqrt(3 i) then r = |z| = sqrt(2 ^ 2 + (- 2sqrt(3)) ^ 2) = sqrt(16) = 4 and theta = tan -2√3/2=-π/3
- Subtracting complex in polar
Given w =√2(cosine (pi/4) + i sine (pi/4) ) and z = 2 (cosine (pi/2) + i sine (pi/2) ). What is w - z expressed in polar form?
- Determine 3882
Determine the sum of the three square roots of 343.
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