# Cotangens - problems

- Regular 5-gon

Calculate area of the regular pentagon with side 7 cm. - Building

How high is the building that throws horizontal shadow 95.4 m long at angle 50°? - Q-Exam

If tg α = 0.9, Calculating sin α, cos α, cotg α . - Aircraft

The plane flies at altitude 6500 m. At the time of first measurement was to see the elevation angle of 21° and second measurement of the elevation angle of 46°. Calculate the distance the plane flew between the two measurements. - Angle

A straight line p given by the equation ?. Calculate the size of angle in degrees between line p and y-axis. - Tree

Between points A and B is 50m. From A we see a tree at an angle 18°. From point B we see the tree in three times bigger angle. How tall is a tree? - How far

From the top of a lighthouse 145 ft above sea level, the angle of depression of a boat 29°. How far is the boat from the lighthouse?

We apologize, but in this category are not a lot of examples.

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Do you have interesting mathematical problem that you can't solve it? Enter it and we can try to solve it.