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Trigonometric Ratios And Identities

TS EAMCET 2020 (Online) 11th September Evening Shift

MCQ+1 / -02020

If $\cos \left(\frac{\alpha-\beta}{2}\right)=2 \cos \left(\frac{\alpha+\beta}{2}\right)$, then $\tan \frac{\alpha}{2} \tan \frac{\beta}{2}=$


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