# Cosine + cotangens - math problems

#### Number of problems found: 5

• Q-Exam
If tg α = 9.6, Calculating sin α, cos α, cotg α .
• Regular 5-gon
Calculate the area of the regular pentagon with side 7 cm.
• 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?
• The rescue helicopter
The rescue helicopter is above the landing site at a height of 180m. The site of the rescue operation can be seen from here at a depth angle of 52° 40 '. How far will the helicopter land from the rescue site?
• Tetrahedral pyramid
Determine the surface of a regular tetrahedral pyramid when its volume is V = 120 and the angle of the sidewall with the base plane is α = 42° 30´.

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Cosine - math word problems. Cotangens - math word problems.