Hello stuck on a few questions 2 cos squared x = 1/2 3 cos 2x + cos x +1 = 0 2 cos 2x - sinx = 0 thanks in advance for any help please show anyworking. :P
Follow Math Help Forum on Facebook and Google+
Originally Posted by Wallothet Hello stuck on a few questions 2 cos squared x = 1/2 3 cos 2x + cos x +1 = 0 2 cos 2x - sinx = 0 thanks in advance for any help please show anyworking. :P Hi and welcome to MHF. Please post one question per thread. I'll start with #1. Divide by 2 and take the square root of both sides to simplify. What do you get and any ideas on how to solve?
View Tag Cloud