# Cosine - practice problems

#### Number of problems found: 243

- Complex roots

Find the sum of the fourth square root of the number 16. - Determine 3882

Determine the sum of the three square roots of 343. - Scalene triangle

Solve the triangle: A = 50°, b = 13, c = 6 - Greatest angle

Calculate the greatest triangle angle with sides 197, 208, 299. - Cotangent

If the angle α is acute, and cotan α = 1/3. Determine the value of sin α, cos α, and tan α. - Parallelogram 49383

The parallelogram has the sides a = 25.3 b = 13.8, and the angle closed by the sides is a = 72 °. Calculate the area of the parallelogram. - Cis notation

Evaluate multiplication of two complex numbers in cis notation: (6 cis 120°)(4 cis 30°) Write the result in cis and Re-Im notation. - Earth's circumference

Calculate the Earth's circumference of the parallel 48 degrees and 10 minutes. - Fifth 3871

What is the sum of the fifth root of 243? - Vector sum

The magnitude of the vector u is 12 and the magnitude of the vector v is 8. The angle between vectors is 61°. What is the magnitude of the vector u + v? - Q-Exam

If tg α = 9.6, Calculating sin α, cos α, cotg α . - Coordinates of square vertices

I have coordinates of square vertices A / -3; 1/and B/1; 4 /. Find coordinates of vertices C and D, C and D. Thanks, Peter. - One side

One side is 36 long with a 15° incline. What is the height at the end of that side? - Cosine

The point (3, 4) is on the terminal side of angle θ. cos θ = ... - Triangle

Calculate the area of the triangle ABC if b = c = 17 cm, R = 19 cm (R is the circumradius). - Angle between lines

Calculate the angle between these two lines: p: -8x +4y +5 =0 q: 10x +10y -7=0 - Road

The angle of a straight road is approximately 12 degrees. Determine the percentage of this road. - Trapezoid 2520

Trapezoid with sides a = 10, b = 20, c = 25, d = 15. Calculate all internal angles. - Periodicity 81597

Simplify by using periodicity cos 1125° - Instantaneous 69064

Describe how the instantaneous power value in the AC circuit changes during one period.

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