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If sinA = 3/5, cosB = –12/13, where A And B Both lie in second quadrant, find the value of sin(A +B).
Given sinA = 3/5 And cosB = -12/13
A And B lie in the second quadrant.
So sine function is positive And cosine function is negative.
We know that
Now consider sin(A +B),
⇒ sin(A +B)