If `A+B+C=pi`, prove that : `(cosA)/(sinBsinC) + (cosB)/(sinC sinA) + (cosC)/(sinA sinB) =2`.
Channel: Doubtnut
Date: 2020-04-12

If `A+B+C=pi`, prove that : `(cosA)/(sinBsinC) + (cosB)/(sinC sinA) + (cosC)/(sinA sinB) =2`.