If `cos (alpha - beta) + cos (beta+gamma) + cos (gamma - alpha) = - 3/2`, prove that: `
Channel: Doubtnut
Date: 2020-04-12

If `cos (alpha - beta) + cos (beta+gamma) + cos (gamma - alpha) = - 3/2`, prove that: `cos alpha + cos beta + cos gamma = sin alpha + sin beta + sin gamma = 0`