Question

If sin A=cos B,then prove that A+B=90⁰​

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

Given that, sin A=cos B

we know that ,cosB=sin(90-B)

substitute equation (2)in(1),we get

sinA=sin(90-B)

If A,B are acute, then A=90⁰_B

:.A+B=90⁰

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