Questions 11, 15, 19, 23, 27Solve all work handwritten , please show work!

CSC & can i 4. 5. 1+ = csc2 u COS U 6. 1 + tanu = 7. sin(7 - u 8. sec - - u) 9. cos(-1) = 10. tan(-1) = 0 csc' x - 21. tan 0 = 2, sin 0 0 tan a ties 51. cos HI - x sec x In Exercises 25-30, match the trigonometric expression with one of the following. cos' y 53. (a) secx (b) - 1 (c) cot x 1 - sin y (d) 1 (e) -tan x (f) sin x uhups 55. sin B tan B + cos B 57. cot u sinu + tan u 25. sec x cos x 26. tan x csc x 27. cot2 x - csc2 x 28. (1 - cos2 x)(csc x) 58. sin 0 sec 0 + cos 0 sin(-x) sin[(77/2) - x] 29. 30. cos(-x) cos[(17/2) - x]