10:14 PM Thu Apr 27 Page 3 > of 6 - 88% ZOOM 17k X 18. Find all the trigonmetric functions of a. 2 a 5 (a) sin(a) = (b) cos(a) = (c) tan(a) = (d) sec(a) = (e) csc(a) = ( f) cot(a) = 19. Using your answer above, find sin(tan-'(3)) 20. More generally, find sin(tan-1(x)) 21. For the same a above, find cos(20)