Trig

Front

What is the sine of an angle in a right triangle?

Back

The sine of an angle is the ratio of the length of the opposite side to the length of the hypotenuse.

Front

What is the cosine of an angle in a right triangle?

Back

The cosine of an angle is the ratio of the length of the adjacent side to the length of the hypotenuse.

Front

What is the tangent of an angle in a right triangle?

Back

The tangent of an angle is the ratio of the length of the opposite side to the length of the adjacent side.

Front

What is the Pythagorean theorem?

Back

In a right triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the other two sides (a² + b² = c²).

Front

What is the relationship between the angles in a right triangle?

Back

The sum of the angles in a right triangle is always 180 degrees, with one angle being 90 degrees.

Front

What is the formula for finding the length of a side using sine?

Back

Opposite side = Hypotenuse × sin(angle).

Front

What is the formula for finding the length of a side using cosine?

Back

Adjacent side = Hypotenuse × cos(angle).

Front

What is the formula for finding the length of a side using tangent?

Back

Opposite side = Adjacent side × tan(angle).

Front

What is the unit circle?

Back

A circle with a radius of 1 centered at the origin of a coordinate plane, used to define trigonometric functions.

Front

What are the values of sine and cosine at 0 degrees?

Back

sin(0°) = 0, cos(0°) = 1.