Question

If tan A and tan B are the roots of x^2 – ax + b = 0, then the value of cos^2(A + B) is :- 1. a^2 / (a^2 + (1-b)^2 2.a^2 / (a^2 + (1+b)^2 3. 1+b / (a^2 + (1-b)^2 4. a^2 / (a+b)^2​

Answer 1

Answer:

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