SOLUTION: I would appreciate some help verifying this identity:
cos(x-(pi/2))=sin x
It may not be verifiable.
Algebra.Com
Question 453274: I would appreciate some help verifying this identity:
cos(x-(pi/2))=sin x
It may not be verifiable.
Answer by richard1234(7193) (Show Source): You can put this solution on YOUR website!
Use the cosine sum formula:
 = \cos(x)\cos(\frac{\pi}{2}) + \sin(x)\sin(\frac{\pi}{2}))
 = \cos(x)(0) + \sin(x)(1) = \sin(x))
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