I need help on these questions please.
1. given that sin^2 x + cos^2 x = 1 show that 1+cot^2 x = cosec^2 x
2. Solve for values x in the interval -pi<x<pi for the following in 2 decimal places:
a. 2cosec(x/2) - 5 =0
b. 2cot^2 x - cot x -7 = 0