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OpenStudy (anonymous):
Prove Identity: sin(x-pi/2)=-cosx I have been trying to figure out this problem for over an hour. I understand most of the basic concept, but this is stumping me for some reason.
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OpenStudy (anonymous):
Two methods - but the first one is not as much of a method as it is a "here's what this thing looks like". So here's what this thing looks like: |dw:1435629703401:dw|
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