The side of a right angled triangle opposite the right angle is 

A ladder of 6m length is kept in slanting position on a straight tree in a plane ground. The ladder makes on angle of 50^o with the plane ground. Calculate the height from the plane ground to the top of the ladder. 

Ratio of sides of right triangle with angle measures 30^o, 60^o, and 90^o is 

In the right angled triangle ABC, ∠B = 90° and ∠C = 30°. if AC = 10cm, find the lengths of the side AB. 

The length of the shadow of a tree is 18m, when the sun is at an elevation of 40^o. What is the height of the tree? 

A ladder leans against a wall with its foot 2m away from the wall and it makes a 40^o angle with the ground. How high is the top of the ladder from the ground? 

For an acute angle A, sin (90^o - A) = 

Two adjacent sides of a parallelogram are 10 cm and 3 cm long and the angle between these sides is 60^o. its area is 

In the figure below, O is the center of the circle. What if the diameter of the circle? 

Evaluate cos 30 + sin30