Hello, Can someone please show me all the algebraic steps for simplifying cos^4x? The problem should be cos^4x = ((1+cos2x)/2)((1+cos2x)/2) thanks!
Follow Math Help Forum on Facebook and Google+
Have a look at this. Table of Trigonometric Identities
Originally Posted by pickslides Have a look at this. Table of Trigonometric Identities Thanks! Although i'm stuck at this part, 1/4(cos^4x+2cos^2x+1) what else could I do?
You are expanding something that does not need to be expanded. You will only end up back at the start.
View Tag Cloud