1.

If sintheta+sinphi=aandcostheta+cosphi=b, then tan((theta-phi)/(2))=?

Answer»

`SQRT((a^(2)+B^(2))/(4-a^(2)-b^(2)))`
`sqrt((4-a^(2)-b^(2))/(a^(2)+b^(2)))`
`sqrt((a^(2)+b^(2))/(4+a^(2)+b^(2)))`
`sqrt((4+a^(2)+b^(2))/(a^(2)+b^(2)))`

ANSWER :B


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