If tanA = 3/4, cosB = 9/41, where π<A < 3π/2 And 0 <B < π/2, find tan(A +B).

Given tanA = 3/4 And cosB = 9/41 where π <A < 3π/2 And 0 <B < π/2

A is in third quadrant And B is in first quadrant.

Tan function And sine function are positive.

__We know that__

We know that

We know that

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