Prove that : `sin^4\ pi/8 + sin^4\ (3pi)/8 + sin^4\ (5pi)/8 + sin^4\ (7pi)/8 = 3/2`
Channel: Doubtnut
Date: 2020-04-05

Prove that : `sin^4\ pi/8 + sin^4\ (3pi)/8 + sin^4\ (5pi)/8 + sin^4\ (7pi)/8 = 3/2`