cos2t+2cos^2(t/2)-2=0
Follow Math Help Forum on Facebook and Google+
Originally Posted by Thelema cos2t+2cos^2(t/2)-2=0 I am sure you know what to do now
Originally Posted by Thelema cos2t+2cos^2(t/2)-2=0 Double angle formula: . Substitute A = t/2: . So your equation can be re-written as ...... Check for mistakes - but you get the idea, right?
..... ..... ..... ..... Let .. is not possible because cos is between -1 and +1. So we only use Solve this for t.
View Tag Cloud