Formule goniometriche

Vero

Falso

Vero

Falso

$$-\sin\alpha$$

$$\sin\alpha$$

$$\cos\alpha$$

$$-\cos\alpha$$

$$-\sin\alpha$$

$$\sin\alpha$$

$$\cos\alpha$$

$$-\cos\alpha$$

$$\tan\alpha$$

$$-\tan\alpha$$

$$\cot\alpha$$

$$-\cot\alpha$$

$$\sin\alpha\ \sin\ \beta+\cos\alpha\cos\beta$$

$$\sin\alpha\sin\beta-\cos\alpha\cos\beta$$

$$\sin\alpha\cos\beta-\sin\beta\cos\alpha$$

$$\sin\alpha\cos\beta+\sin\beta\cos\alpha$$

$$\cos\alpha\cos\beta+\sin\alpha\sin\beta$$

$$\cos\alpha\cos\beta-\sin\alpha\sin\beta$$

$$\sin\alpha\ \cos\beta-\cos\alpha\ \sin\ \beta$$

$$\sin\alpha\cos\beta+\sin\beta\cos\alpha$$

$$\cos\alpha\cos\beta+\sin\alpha\sin\beta$$

$$\cos\alpha\cos\beta-\sin\alpha\sin\beta$$

$$\sin\alpha\ \cos\beta-\cos\alpha\ \sin\ \beta$$

$$\sin\alpha\cos\beta+\sin\beta\cos\alpha$$

$$\cos^2\beta+\sin^2\beta$$

$$\cos^2\beta-\sin^2\beta$$

$$2\sin\beta\ \cos\beta$$

$$1-2\sin^2\beta$$

$$\cos^2\alpha-\sin^2\alpha$$

$$\cos^2\theta-\sin^2\theta$$

$$2\sin\theta\cos\theta$$

$$2\sin\alpha\cos\alpha$$