1- A 13-foot ladder is resting against a wall and makes an angle of 59 with the ground. Find the height to which the ladder will reach on the wall. (Round your answer to one decimal place.)

= ? ft

2-

Verify the identity. 5 - 5 tan# X = 5(1 - tan2 x) secz x First factor the numerator, then use the Pythagorean identity for sec x. Finally simplify by dividing out the common factors. (Simplify completely at each step.) 5 - 5 tan4 x _ 5(1 - tan4 x) secz x secz x 5 ( 1 + )(1 - tan2 x) secz x S (1 - tan2 x) secz x =Solve the equation for solutions in the interval 0