[" If "cos theta=cos alpha cos beta],[" then "tan((theta+alpha)/(2))tan((theta-alpha)/(2))=]

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

If cos theta = cos alpha cos beta, "then tan" (theta - alpha)/(2) is equal to

If cos theta = ( cos alpha - cos beta )/(1- cos alpha cos beta ) " then " tan^(2)""((theta )/(2)) tan^(2)""((beta)/(2))=

If cos theta=(cos alpha+cos beta)/(1+cos alpha cos beta), prove that (tan theta)/(2)=-(tan alpha)/(2)(tan beta)/(2)

If cos theta=(a cos alpha+b)/(a+b cos alpha), then the value of tan((theta)/(2)) is :

If cos theta = (cos alpha - cos beta)/(1-cos alpha cos beta) , then one of the values of tan((theta)/(2)) is

If cos theta=(cos alpha-cos beta)/(1-cos alpha*cos beta), prove that tan(theta)/(2)=+-(tan alpha)/(2)(cot beta)/(2)

If cos theta=(cos alpha-cos beta)/(1-cos alpha cos beta), prove that (tan theta)/(2)=+-(tan alpha)/(2)(cot beta)/(2)

If cos theta =(cos alpha - cos beta)/( 1- cos alpha cos beta), then one of the values of tan ((theta )/(2)) is