I want to show that (sin2kx / 2sinx) + cos(2k-1)x = sin(2k+2)x / 2sinx I presume I could convert the cos expression to sin first. This is more difficult than the trigonometry I normally do.
Follow Math Help Forum on Facebook and Google+
. Therefore
Thanks, that was more work than I thought it would be. You have made a mistake at the 5th line and further. The last + should be -.
View Tag Cloud