SOLUTION: verify that cos(pi/2 + x)=-sinx

SOLUTION: verify that cos(pi/2 + x)=-sinx

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Question 80913: verify that cos(pi/2 + x)=-sinx
Answer by funmath(2933) (Show Source): You can put this solution on YOUR website!
verify that cos(pi/2 + x)=-sinx
The sum formula that applies here is:

Another important thing to remember is and

Happy Calculating!!!!
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