Question 4 - Trignometric ratios of complementry angles - Chapter 8 Class 10 Introduction to Trignometry

Last updated at August 14, 2026 by

Ex 8.3, 4 - If tan A = cot B, prove that A + B = 90 - Trignometric ratios of complementry angles

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Question 4 If tan A = cot B, prove that A + B = 90 . Given tan A = cot B To solve this we should know relation between tan and cot Now, We know that cot θ = tan (90 - θ) Putting value of cot B tan A = tan (90 - B) Comparing angles A = 90 - B A + B = 90 Hence proved.

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