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cos theta=(cos alpha-cos beta)/(1-cos al...

cos theta=(cos alpha-cos beta)/(1-cos alpha cos beta)+tan tan theta=?

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

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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)