# Tangent + cosine - math problems

#### Number of problems found: 49

- Q-Exam

If tg α = 9.6, Calculating sin α, cos α, cotg α . - Angle between lines

Calculate the angle between these two lines: ? ? - Cotangent

If the angle α is acute, and cotan α = 1/3. Determine the value of sin α, cos α, tg α. - Trigonometric functions

In the right triangle is: ? Find the value of s and c: ? ? - Right triangle trigonometrics

Calculate the size of the remaining sides and angles of a right triangle ABC if it is given: b = 10 cm; c = 20 cm; angle alpha = 60° and the angle beta = 30° (use the Pythagorean theorem and functions sine, cosine, tangent, cotangent) - Right

Determine angles of the right triangle with the hypotenuse c and legs a, b, if: ? - One side

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

The angle of a straight road is approximately 12 degrees. Determine the percentage of this road. - Sphere in cone

A sphere of radius 3 cm describes a cone with minimum volume. Determine cone dimensions. - EQL triangle

Calculate inradius and circumradius of equilateral triangle with side a=77 cm. - Regular 5-gon

Calculate the area of the regular pentagon with side 7 cm. - Isosceles triangle 10

In an isosceles triangle, the equal sides are 2/3 of the length of the base. Determine the measure of the base angles. - Right angled triangle 3

Side b = 1.5, hypotenuse angle A = 70 degrees, Angle B = 20 degrees. Find its unknown sides length. - Right triangle

Calculate the length of the remaining two sides and the angles in the rectangular triangle ABC if a = 10 cm, angle alpha = 18°40'. - Pentadecagon

Calculate the content of a regular 15-sides polygon inscribed in a circle with radius r = 4. Express the result to two decimal places. - Building

The building I focused at an angle 30°. When I moved 5 m building I focused at an angle 45°. What is the height of the building? - Ratio iso triangle

The ratio of the sides of an isosceles triangle is 7:6:7 Find the base angle to the nearest answer correct to 3 significant figure. - Diagonals of pentagon

Calculate the diagonal length of the regular pentagon: a) inscribed in a circle of radius 12dm; b) a circumscribed circle with a radius of 12dm. - Rectangle

Calculate the length of the side GN and diagonal QN of rectangle QGNH when given: |HN| = 25 cm and angle ∠ QGH = 28 degrees. - Regular n-gon

Which regular polygon have a radius of circumscribed circle r = 10 cm and the radius of inscribed circle p = 9.962 cm?

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