If `costheta=cosalphacosbeta` , prove that `t a n(theta+alpha)/2t a n(theta-alpha)/2=t a n^2beta/2` .

If cos theta=cos alpha cos beta, prove that tan(theta+alpha)/(2)tan(theta-alpha)/(2)=tan^(2)(beta)/(2)

If sin theta=n sin(theta+2 alpha), prove that tan(theta+alpha)=(1+n)/(1-n)tan alpha

Prove that: tan^2theta=tan^2alpha ,theta=npi+-alpha,n in Z

If costheta=(cosalphacosbeta)/(1-sinalphasinbeta) then prove that tan((theta)/(2))=(tan((alpha)/(2))-tan((beta)/(2)))/(1-tan((alpha)/(2))tan((beta)/(2)))

If sintheta=nsin(theta+2alpha) then prove that, tan(theta+alpha)=(1+n)/(1-n)tanalpha

If sin theta=n"sin"(theta+2alpha) , prove that tan(theta+alpha)=(1+n)/(1-n)tanalpha .

If msintheta=n sin(theta+2alpha), prove that tan(theta+alpha)cotalpha=(m+n)/(m-n)dot

If m sin theta=n sin(theta+2 alpha), prove that tan(theta+alpha)cot alpha=(m+n)/(m-n)

Prove that: tan^(2)theta=tan^(2)alpha,theta=n pi+-alpha,n in Z

If msintheta=nsin(theta+2alpha) , then prove that tan(theta+alpha)cotalpha=(m+n)/(m-n) .