Trigonometric Functions and Ratios

Front

What is a trigonometric function?

Back

A trigonometric function relates the angles of a triangle to the lengths of its sides. The primary trigonometric functions are sine, cosine, and tangent.

Front

Define sine in terms of a right triangle.

Back

Front

Define cosine in terms of a right triangle.

Back

Front

Define tangent in terms of a right triangle.

Back

Front

What is the Pythagorean theorem?

Back

Front

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

Back

You should use the sine function.

Front

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

Back

You should use the cosine function.

Front

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

Back

You should use the tangent function.

Front

What is the relationship between sine and cosine?

Back

Front

How do you find the length of a side using trigonometric ratios?

Back

Use the appropriate trigonometric function based on the known sides and the angle, then rearrange the formula to solve for the unknown side.