Question 1 (i) - sin 90 - θ, cos 90 - θ formula - Chapter 8 Class 10 Introduction to Trignometry

Last updated at Dec. 13, 2024 by

Ex 8.3, 1 - Evaluate (i) sin 18 / cos 72 (ii) tan 26/cot 64 - Trignometric ratios of complementry angles

 

 

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Question 1 Evaluate : (i) sin 18 /cos 72 sin 18 /cos 72 = sin 18 /cos (90 18 ) = sin 18 /(sin 18 ) = 1

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