Show that cos thetha + cos 3thetha + cos 5thetha = cos 3thetha 2cos 2thetha+ 1 by using compound angle formula. Hence solve, cos thetha + cos 3thetha + cos 5thetha = 0 for greater than equal thetha less than equal pi Share with your friends Share 0 Ashok Kumar Jha answered this 0 View Full Answer Deeya Malhotra answered this Please give it in the form of equation 0 Ahmad answered this answer 0
