How do you simplify $sin A (csc A - sin A)$ $sin A (cscA-sinA)$ ?

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Nov 4, 2015

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$sin A \cdot (csc A - sin A) = sin A \cdot (\frac{1}{sin A} - sin A) = 1 - {sin}^{2} A = {cos}^{2} A$ $sinA*(cscA-sinA)=sinA*(1/sinA-sinA)=1-sin^2A=cos^2A$

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How do you simplify $sin A (csc A - sin A)$ $sin A (cscA-sinA)$ ?

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