Asked by Kewal

If sinA + sinB = a and cosA + cosB = b, find the value of tanA-B/2
Answered by Steve
Recall your sum-to-product identities:

sinA + sinB = 2 sin(A+B)/2 cos(A-B)/2
cosA + cosB = 2 cos(A+B)/2 cos(A-B)/2

That should get you started.
Answered by Avinash
a/b is a value of tan[A-B/2]
Answered by Abhinav
Galat answer h chutiye
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