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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.
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