$3-10$ . Double Angle Formulas Find $\sin 2 x, \cos 2 x,$ and $\tan 2 x$ from the given information.$$\cos x=\frac{4}{5}, \quad \csc x<0$$

$3-10$ . Double Angle Formulas Find $\sin 2 x, \cos 2 x,$ and $\tan 2 x$ from the given information.$$\sin x=-\frac{3}{5}, \quad x \text { in Quadrant } \mathrm{III}$$

$3-10$ . Double Angle Formulas Find $\sin 2 x, \cos 2 x,$ and $\tan 2 x$ from the given information.$$\tan x=-\frac{1}{3}, \quad \cos x>0$$

11-16 = Lowering Powers in a Trigonometric Expression Use the formulas for lowering powers to rewrite the expression in terms of the first power of cosine, as in Example 4 .$$\cos ^{2} x \sin ^{4} x$$

11-16 = Lowering Powers in a Trigonometric Expression Use the formulas for lowering powers to rewrite the expression in terms of the first power of cosine, as in Example 4 .$$\cos ^{4} x \sin ^{4} x$$

11-16 = Lowering Powers in a Trigonometric Expression Use the formulas for lowering powers to rewrite the expression in terms of the first power of cosine, as in Example 4 .$$\cos ^{6} x$$