JEE MATHEMATICS MCQ: TRIGONOMETRIC EQUATIONS

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Analyzing +4 | -1

\cos A=m \cos B

and

\cot \left(\frac{A+B}{2}\right)=\lambda/\tan \left(\frac{B-A}{2}\right)

, then

\lambda

is equal to

View answer and explanation

Correct option: C

\frac{m+1}{m-1}

Option C (

\frac{{m+1}}{{m-1}}

) is correct because it's derived by applying the componendo and dividendo rule and trigonometric identities to the given equation.

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