Please do problems#1, 2, 4, 8, 9, 10, 11, 14, 16, 22, 23, 24, 26

640 CHAPTER 7 TRIGONOMETRIC IDENTITIES AND EQUATIONS For the following exercises, use Figure 1 to find the desired quantities. 25 24 Figure 1 24. sin(26), cos(2/), tan(28), sin(2a), cos(20), 25. sin ( 5 ), cos( ), tan ( ), sin( " ), cos( 2 ). and tan(20) and tan For the following exercises, prove the identity. 2cos(2x) = cot x - tan x 27. cot x cos(2x) = - sin(2x) + cot x sin(2x)