sin

Trigonometry Formulas

Trigonometric functions, identities, and laws for angles and triangles.

\sin\theta = \frac{opposite}{hypotenuse}

Basic sine ratio in a right triangle.

\cos\theta = \frac{adjacent}{hypotenuse}

Basic cosine ratio in a right triangle.

\tan\theta = \frac{opposite}{adjacent}

The ratio of the opposite side to the adjacent side in a right triangle.

\sin^2\theta + \cos^2\theta = 1

The fundamental trigonometric identity stating that the square of the sine plus the square of the cosine equals one.