...x(t)=-2\cos(8t)+3\sin(8t) using only one cosine function...
Question: Using a trig identity, write {eq}x(t)=-2\cos(8t)+3\sin(8t) {/eq} using only one cosine function. Abusing the angle-sum formula We can simplify {eq}a\cos\theta+b\sin\theta {/eq} into either {eq}k\cos(\theta+x) {/eq} or {eq}k\sin(...