1.

If tan (π/4 + x) + tan (π/4 − x) = a, then tan2 (π/4 + x) + tan2 (π/4 − x) =(a) a2 + 1(b) a2 + 2(c) a2 − 2(d) None of these

Answer» If tan (π/4 + x) + tan (π/4 − x) = a, then tan2 (π/4 + x) + tan2 (π/4 − x) =

(a) a2 + 1

(b) a2 + 2

(c) a2 − 2

(d) None of these


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