SOLUTION: if cos theta = m, find sin(theta-pi/2)

Question 1040491: if cos theta = m, find sin(theta-pi/2)
Answer by ikleyn(52805) (Show Source): You can put this solution on YOUR website!
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sin(theta-pi/2) = - cos(theta). Always.

Therefore, sin(theta-pi/2) = -m in this case.

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