Home Comp. Mathematics If A+B+C=pi , prove that: sin5A+sin5B+sin5C=4cos(5A/2).cos(5B/2).cos(5C/2)

Sunday, March 18, 2018

If A+B+C=pi , prove that: sin5A+sin5B+sin5C=4cos(5A/2).cos(5B/2).cos(5C/2)


Soln: