Right Triangle Trigonometry Basics

Front

Sine (sin)

Back

A trigonometric function representing the ratio of the length of the opposite side to the hypotenuse in a right-angled triangle.

Front

Cosine (cos)

Back

A trigonometric function representing the ratio of the length of the adjacent side to the hypotenuse in a right-angled triangle.

Front

Tangent (tan)

Back

A trigonometric function representing the ratio of the length of the opposite side to the adjacent side in a right-angled triangle.

Front

Opposite Side

Back

The side opposite the reference angle (theta) in a right triangle.

Front

Adjacent Side

Back

The side next to the reference angle (theta) in a right triangle.

Front

Theta, Alpha, Beta

Back

Variables used to represent angles in trigonometry.

Front

Hypotenuse

Back

The longest side of a right-angled triangle, opposite the right angle.