Question

CUSCIUNO.
If sin A.Sin B-cos A.cosB + 1 = 0, then cot A. tan B =
1).-4
2).-3
3).-2.
4).-1​

Answer 1

Answer:

If sin A . sin B - cos A . cos B + 1 = 0, then cot A . tan B = -1

Therefore Option is 4 that is, -1 .