If `cos theta=(cos alpha cos beta)/(1-sin alpha sin beta),` prove that one value of `(tan) theta/2=(tan alpha/2-tan beta/2)/(1-t a n alpha/2 tan beta/2).`

If cos theta=(cos alpha cos beta)/(1-sin alpha sin beta), prove that one value of (tan)(theta)/(2)=((tan alpha)/(2)-(tan beta)/(2))/(1-tan(alpha)/(2)(tan beta)/(2))

If cos theta=(cos alpha-cos beta)/(1-sin alpha sin beta), prove that one value of tan(theta)/(2)=(tan(alpha)/(2)-tan(beta)/(2))/(1-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)(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), 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

Prove that cos theta =(cos alpha- cos beta)/(1 -cos alpha*cos beta) ⇔ tan theta/2 = pm tan alpha/2 *cot beta/2 .

cos theta = (cos alpha-cos beta) / (1-cos alpha * cos beta) rArr tan ^ (2) ((theta) / (2)) tan ^ (2) ((beta) / (2))

If 3sin alpha = sin beta!=0 , then the value of |(tan((alpha + beta)/2))/(tan((alpha-beta)/2))|