My teacher wrote this on the board
cos^2(2x) = (1+cos(6x))/2
Can someone please help me to understand this? I actually think I copied something down wrong. Thanks.
My teacher wrote this on the board
cos^2(2x) = (1+cos(6x))/2
Can someone please help me to understand this? I actually think I copied something down wrong. Thanks.
So if I know for sure that the right hand side is (1+cos(6x))/2 then the left hand side would be cos^2(3x) ?? I am trying to figure out what exactly I copied down wrong. Thanks.