lf `sintheta+sinphi =a` and `costheta + cosphi = b`, find the value of `tan((theta-phi)/2) `

If sin theta+sin phi=a and cos theta+cos phi=b find the value of tan((theta-phi)/(2))

If sintheta+sinphi=a , costheta+cosphi=b find the value of tan((theta-phi)/2)

If sintheta+sinphi=aand costheta+ cosphi =b, then

If Sintheta=costheta , find the value of theta

If sintheta+sinphi=a and costheta+cosphi=b then show that tan((theta+phi)/2)=a/b

If sintheta+costheta=sqrt2 find the value of theta

If sintheta+sinphi=aandcostheta+cosphi=b find cos((theta-phi)/(2)) in terms of a and b.

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

If sintheta_1sintheta_2-costheta_1costheta_2+1=0, then the value of tan((theta_1)/2)cot((theta_2)/2) is equal to

If sintheta_1sintheta_2-costheta_1costheta_2+1=0, then the value of tan((theta_1)/2)cot((theta_2)/2) is equal to (a) -1 (b) 1 (c) 2 (d) -2