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OpenStudy (anonymous):
simplify: cos(π/2-x)
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OpenStudy (anonymous):
cofunction identity for this one
OpenStudy (anonymous):
\[\cos(\frac{\pi}{2}-x)=\sin(x)\] and if you draw a triangle it will be clear why this has to be true
OpenStudy (anonymous):
|dw:1367204442318:dw|
OpenStudy (anonymous):
got it thank you
OpenStudy (anonymous):
is there any other way i can do this without the diagram?
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