If we establish an identity, sinAcscA - sin2A could equal which of the following quantities? 1 cos^(2) x A sin^(2) x A – 1 tan^(2) x A thanks
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Originally Posted by andy11 If we establish an identity, sinAcscA - sin2A could equal which of the following quantities? 1 cos2A sin2A – 1 tan2A thanks $\displaystyle sin(A)csc(A) - sin^2(A)$<-- I had to be a bit of an oracle here! $\displaystyle = \frac{sin(A)}{sin(A)} - sin^2(A)$ $\displaystyle = 1 - sin^2(A) = cos^2(A)$ -Dan
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