I need help with this one...
sin3A+cos3A/sinA + CosA = 1-sinAcosA
Last edited by WhatthePatel; November 10th 2012 at 03:24 PM.
Follow Math Help Forum on Facebook and Google+
Originally Posted by WhatthePatel I need help with this one...
sin3A+cos3A/sinA + CosA = 1-sinAcosA Hint:
sin3x = 3cos2xsinx-sin3x
finish it using appropriate double angle identities.
... and, start a new thread for a new problem.
View Tag Cloud