Ok well that makes a lot more sense. This one is fairly easy and you may well kick yourself. Remember that $\displaystyle cos^{2}(x)$ is equal to $\displaystyle 1-sin^{2}(x)$. From there it is elementary my dear Watson.
Ok well that makes a lot more sense. This one is fairly easy and you may well kick yourself. Remember that $\displaystyle cos^{2}(x)$ is equal to $\displaystyle 1-sin^{2}(x)$. From there it is elementary my dear Watson.
i see my mistake, but thank you for your help sherlock
haha