Question

If sinA=cos B,then prove that A+B=90

Answer 1

Answer:

▶Here's your answer

$\sin(a) = \cos(b) \\ \\ sin(a) = \cos(90 - a) \\ \\ \cos(90 - a) = \cos(b) \\ \\ 90 - a = b \\ \\ 90 = a + b \\ \\ therefore \: a + b = 90$

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