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If sinA=3/5 and cosB =-12/15, where A an...

If `sinA=3/5` and `cosB =-12/15`, where A and B both lie in second quadrant, then find the value of sin(A+B).

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AAKASH INSTITUTE ENGLISH-TRIGNOMETRIC FUNCTIONS -Try Yourself
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  13. Prove that : cos4x=1-8sin^2xcos^2x

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