" 17.If "cos theta=cos alpha cos beta," show that "tan((theta+alpha)/(2))tan((theta-alpha)/(2))=tan^(2)(beta)/(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))tan((theta-alpha)/(2))=(i)tan^(2)((alpha)/(2))(ii)tan^(2)((beta)/(2))( iii)tan ^(2)((theta)/(2))(iv)cot^(2)((beta)/(2))

If cos theta=cos alpha cos beta then tan((theta+alpha)/2) tan((theta-alpha)/2)= (i) tan^2(alpha/2) (ii) tan^2(beta/2) (iii) tan^2(theta/2) (iv) cot^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), prove that (tan theta)/(2)=-(tan alpha)/(2)(tan 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 " tan^(2)""((theta )/(2)) tan^(2)""((beta)/(2))=