If sinA = 3/5, cosB = –12/13, where A And B Both lie in second quadrant, find the value of sin(A +B).

Question

Philoid · Accepted Answer

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)