(Solved): Please help with #9,13 Find values of the sine and cosine functions for each angle measure. See Exam ...

Find values of the sine and cosine functions for each angle measure. See Examples 1 and 2. 7. $2\theta$, given $\sin \theta =\frac{2}{5}$ and $\cos \theta <0$ 8. $2\theta$, given $\cos \theta =-\frac{12}{13}$ and $\sin \theta >0$ 9. $2x$, given $\tan x=2$ and $\cos x>0$ 10. $2x$, given $\tan x=\frac{5}{3}$ and $\sin x<0$ 11. $2\theta$, given $\sin \theta =-\frac{\sqrt{5}}{7}$ and $\cos \theta >0$ 12. $2\theta$, given $\cos \theta =\frac{\sqrt{3}}{5}$ and $\sin \theta >0$ 13. $\theta$, given $\cos 2\theta =\frac{3}{5}$ and $\theta$ terminates 14. $\theta$, given $\cos 2\theta =\frac{3}{4}$ and $\theta$ terminates in quadrant I in quadrant III