NCERT Exercise 8.1 - Q8 - Introduction to Trigonometry

Question: If 3 cot A = 4, check whether (1 — tan^2 A)/(1 + tan^2 A) = cos^2 A — sin^2 A or not.

Answer: Yes. (1 — tan^2 A)/(1 + tan^2 A) = cos^2 A — sin^2 A = 7/25.

Full step-by-step NCERT solution with diagrams on Something by Zero.

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