19. Express sine in terms of cote. (1+cot2e) 1+cot2e (2+sin2e) A. sine- C. sine = 2+sin?e /1- 1-sec2e sec²e) D. sine-2-sec) 2-sec2e B. sine - D. sine = 20. What is the equivalent expression of cos-x-sin A. sin* x+csc*x C. cos"x-sin*x B. cot'x+ cos 'x 4 D. sin" x- tan'x 4

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