Ex 8.3, 3 (i) [MCQ] - Chapter 8 Class 10 Introduction to Trignometry

Last updated at July 22, 2026 by

Choose correct option: 9 sec^2 A - 9 tan^2 A = - MCQ Trigonometry - Ex 8.3

 

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Ex 8.3, 3 Choose the correct option. Justify your choice. (i) 9 sec2 A – 9 tan2 A 1 (B) 9 (C) 8 (D) 0 9 sec2 A – 9 tan2 A As sec2 A = 1 + tan2 A = 9 (1 + tan2 A) – 9 tan2 A = 9 + 9 tan2 A – 9 tan2 A = 9 + 0 = 9 So, the correct answer is (b)

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