Q17 of 90 Page 7

Mark the correct alternative in the following:

If tan (π/4 + x) + tan (π/4 – x) = a, then tan2 (π /4 + x) + tan2 (π /4 – x) =




= a2 - 2

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Mark the correct alternative in the following:

If A – B = π /4, then (1 + tan A) (1 – tanB) is equal to