6. Trigonometric Identities and More Equations

Given $\(\tan\]\theta\)=\(\frac{5}{12}\)$ and 0 < $\(\theta\)$ < $\(\frac{\pi}{2}\)$, find $\(\cos\[\left\)(2\(\theta\]\right\))$.

In Exercises 1–6, use the figures to find the exact value of each trigonometric function.

sin 2θ