Question 736309: John wants to measure the height of a tree. He walks exactly 100 feet from the base of the tree and looks up.

SOLUTION: 3. Use sum, difference, double angle, and/or half angle identities to evaluate exactly. Show all work sin(25°)*cos(35°)+cos(25°)*sin(35°)

Question 192726: A kite is 100 feet above the ground. How many feet of string (to the nearest foot) are used if the angle of elevation is 35*?

You can put this solution on YOUR website! 15° and 75° are complementary angles, because their sum 15°+75° is 90° Tangent and cotangent are complementary functions, usually called "cofunctions".

You can put this solution on YOUR website! One easy way is to use calculator: http://web2.0calc.com/ When on the site click sin then 35 and then close parentheses and ...

Question 967297: suppose a triangle has two sides of length 42 and 35, and that the angle between these two sides is 120.