Question

If alpha +beta =gamma ,then cos^2 alpha+cos^2beta+cos^2 gamma-2cos alpha.cos beta.cos gamma​

Answer 1

Answer:

If alpha + beta = gamma prove that cos^2 alpha+ cos^ 2 beta+cos^2gamma=1+2cos alpha cos beta cos gamma.

Answer 2

Step-by-step explanation:

is equal to 1. thank you