🌺13.5 Double Angle

$$\frac{120}{169}$$  

$$\frac{25}{169}$$  

$$\frac{60}{169}$$  

$$\frac{5}{13}$$  

$$-\frac{1}{5}$$

$$\frac{24}{25}$$

$$-\frac{24}{25}$$

$$-\frac{25}{24}$$

$$\sin\left(5\right)\cos\left(5\right)$$  

$$\sin\left(20\right)\cos\left(20\right)$$  

$$\cos\left(20\right)$$  

$$\sin\left(20\right)$$  

$$\sin^2x\cos^2x$$  

$$4\sin x\cos x$$  

$$2\sin^2x\cos^2x$$  

$$4\sin^2x\cos^2x$$  

$$\frac{\sin^2x\cos^2x}{2}$$  

$$\frac{4\tan\left(x\right)}{1-\tan^2\left(x\right)}$$  

$$\frac{4\tan\left(x\right)}{\sec^2\left(x\right)}$$  

$$4\tan\left(x\right)$$  

$$1-\tan^2\left(2x\right)$$  

$$-\frac{1}{5}$$  

$$\frac{7}{25}$$  

$$-\frac{7}{25}$$  

$$-\frac{25}{7}$$  

$$-1$$  

$$\frac{7}{24}$$  

$$\frac{24}{7}$$  

$$-\frac{24}{7}$$  

$$\cos64\degree$$  

$$\cos16\degree$$  

$$\sin64\degree$$  

$$\sin16\degree$$  

$$\sin\frac{\pi}{10}$$  

$$\sin\frac{2\pi}{5}$$  

$$\cos\frac{2\pi}{5}$$  

$$\cos\frac{\pi}{10}$$  

$$\sin15^o$$  

$$\cos60^o$$  

$$\sin60^o$$  

$$\cos15^o$$