Trigonometric Ratios

a) sin (u/2)     b) cos (2u)   c) tan (2u)

pls answer this  question now....

pls answer to this question  urgent...

If point A is 54 feet from the tree, and the angle between the ground at point A and the top of the tree is 25 degrees, find the height of the tree.

If point A is 54 feet from the tree, and the angle between the ground at point A and the top of the tree is 25 degrees, find the height of the tree.

Use a 30°-60°-90° triangle to justify the conjecture

The solution to the trig equation 4cos theta +3 =0 are in which quadrant?   Given csc theta = 2 sqrt3/3 and -270 degrees < theta <180 degrees Determine the exact values of... more

a bookcase fits diagonally into a corner of a room. Each side uses the same amount of wall space. Front of bookcase is 54 inches wide. What angles are formed where the front of the bookcase touched... more

A monument and a building were placed on the circumference of a circle of radius "r" ft. on the level ground, the angle of elevation of their tops at the center of the circle would be 30° and 60°... more

If m = 6.25 cm and n = 10 cm, what is the measure of angle ?

 Solve the problem using trigonometric ratios and round your answer to the nearest whole number.

i need help in trigonometric ratios