# Goniometry and trigonometry - math problems

#### Number of problems found: 423

- Pentagon

Calculate the area of a regular pentagon, which diagonal is u=16. - Side c

In △ABC a=2, b=4 and ∠C=100°. Calculate length of the side c. - Right

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

AC= 40cm , angle DAB=38 , angle DCB=58 , angle DBC=90 , DB is perpendicular on AC , find BD and AD - Earth's circumference

Calculate the Earth's circumference of the parallel 48 degrees and 10 minutes. - Decide 2

Decide whether points A[-2, -5], B[4, 3] and C[16, -1] lie on the same line - The ladder

The ladder has a length of 3 m and is leaning against the wall, and its inclination to the wall is 45°. How high does it reach? - Climb

Road has climbing 1:27. How big is a angle corresponds to this climbing? - Descent of road

Road sign informs the gradient is 10.9%. Calculate the angle which average decreases. - Angle between lines

Calculate the angle between these two lines: ? ? - The angle of lines

Calculate the angle of two lines y=x-21 and y=-2x+14 - Pilot

How high is the airplane's pilot to see 0.001 of Earth's surface? - Tangens parallelogram

If ∠BAD between the sides AB and AD of the parallelogram is θ, what is tan θ? See diagram: A=(7,1) B=(5,-2) C=(12,1) D=(14,4) - Right triangle

A right triangle ABC is given, c is a hypotenuse. Find the length of the sides a, b, the angle beta if c = 5 and angle alfa = A = 35 degrees. - Study

For 7 hours of study, she scored a 75, so if she made 93, how many hours would she need to study? - Ladder slope

What is the slope of a ladder 6.2 m long and 5.12 m in height. - Railway

Railway line had on 5.8 km segment climb 9 permille. How many meters track ascent? - Isosceles triangle

What are the angles of an isosceles triangle ABC if its base is long a=5 m and has an arm b=4 m. - Road

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

The water tank is filled with two pumps in 48 minutes. How long would it take to fill it with 5 same pumps?

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Most natural application of trigonometry and trigonometric functions is a calculation of the triangles. Common and less common calculations of different types of triangles offers our triangle calculator. Word trigonometry comes from Greek and literally means triangle calculation.