Question: Solve the following trig problems Math 175 5.3 Bookwork Version 2 Use exact values to show that the following is true. 30. cos90 = 1

Solve the following trig problems

Math 175 5.3 Bookwork Version 2 Use exact values to show that the following is true. 30. cos90 = 1 - 2sin2450 Prove the following identities. 44. (cosx - sinx) (cosx + sinx) = cos(2x) 46. sin20 = _ 1 - cos(20) 2 50. 2cot(2x) = cotx - tanx

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