Question

(ii) (1 + tan A)^2 + (1 - tan A)^2 = 2 sec^2 A​

Answer 1

Answer:

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Answer 2

Answer:

L.H.S = (1+tanA)² + (1-tanA)²

= 1+tan²A+2tanA+1+tan²A-2tanA

= 2(1+tan²A)

= 2 sec²A

= R.H.S