1.

If sin A + cos B = a and sin B + cos A = b, then sin (A + B) is equal to

Answer»

`(a^(2)+B^(2))/2`
`(a^(2)-b^(2)+2)/2`
`(a^(2)+b^(2)-2)/2`
`(a^(2)-b^(2)-2)/2`

ANSWER :C


Discussion

No Comment Found