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For the following exercises, change the functions from a product to a sum or a sum to a product. 35. sin(9x)cos(3x) 36. cos(7x) cos(12x) 37.

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For the following exercises, change the functions from a product to a sum or a sum to a product. 35. sin(9x)cos(3x) 36. cos(7x) cos(12x) 37. sin(1 1x) + sin(2x) 38. cos(6x) + cos(5x) SOLVING TRIGONOMETRIC EQUATIONS For the following exercises, find all exact solutions on the interval [0, 27). 39. tan x + 1 = 0 40. 2sin(2x) + V2 =0 For the following exercises, find all exact solutions on the interval [0, 27). 41. 2sin2 x - sin x = 0 42. cos' x - cos x - 1= 0 43. 2sin2 x + 5 sin x + 3 = 0 44. cos x - 5sin(2x) = 0 45. 1 + 2 + sin2 x + 4cos2 x =0 secz x

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