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If tan A = cot B, prove that A + B = 90°.Q.4

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What is the best way to solve the question of introduction of trigonometry of class 10 ncert , how i solve this question easily and fastly give me the best solution of this question no.4 of exercise 8.3 .If tan A = cot B, prove that A + B = 90°

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  1. tan A = cot B

    We know that cot B = tan (90° – B)

    To prove A + B = 90°, substitute the above equation in the given problem

    tan A = tan (90° – B)

    A = 90° – B

    A + B = 90°

    Hence Proved.

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