Trig Ratios, Sides, & Angles

Front

What is the sine function used for in trigonometry?

Back

The sine function is used to find the ratio of the length of the opposite side to the length of the hypotenuse in a right triangle.

Front

What is the mnemonic to remember trigonometric ratios?

Back

Soh Cah Toa.

Front

If you know the opposite side and hypotenuse, which trig function do you use?

Back

Sine.

Front

If you know the adjacent side and hypotenuse, which trig function do you use?

Back

Cosine.

Front

If you know the opposite side and adjacent side, which trig function do you use?

Back

Tangent.

Front

What is the cosine function used for in trigonometry?

Back

The cosine function is used to find the ratio of the length of the adjacent side to the length of the hypotenuse in a right triangle.

Front

What is the tangent function used for in trigonometry?

Back

The tangent function is used to find the ratio of the length of the opposite side to the length of the adjacent side in a right triangle.

Front

How do you find the measure of an angle using trigonometric ratios?

Back

You can use the inverse trigonometric functions (arcsin, arccos, arctan) to find the measure of an angle.

Front

What is the relationship between the sides of a right triangle and its angles?

Back

The lengths of the sides of a right triangle are proportional to the sine, cosine, and tangent of its angles.

Front

What is the Pythagorean theorem?

Back

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