Question

Somebody please solve this!!!​

Answer 1

See below.

Explanation:

We know that

tanA + tan B

tan (A + B) = ---------------------

1 - tanAtanB

Substituting for A + B

tan (A + B) = tan pi/4 = 1.

tanA + tan B

So ------------------ = 1

1 - tanAtanB

Therefore tanA + tan B = 1 - tanAtanB.