8.2 - Trig - Finding Sides

Front

What is the sine function?

Back

The sine function (sin) is a trigonometric function that relates the angle of a right triangle to the ratio of the length of the opposite side to the length of the hypotenuse.

Front

When should you use the sine function?

Back

Use the sine function when you have the length of the opposite side and the hypotenuse of a right triangle.

Front

What is the cosine function?

Back

The cosine function (cos) relates the angle of a right triangle to the ratio of the length of the adjacent side to the length of the hypotenuse.

Front

When should you use the cosine function?

Back

Use the cosine function when you have the length of the adjacent side and the hypotenuse of a right triangle.

Front

What is the tangent function?

Back

The tangent function (tan) relates the angle of a right triangle to the ratio of the length of the opposite side to the length of the adjacent side.

Front

When should you use the tangent function?

Back

Use the tangent function when you have the lengths of the opposite and adjacent sides of a right triangle.

Front

What is the formula for finding the opposite side using sine?

Back

The formula is: sin(angle) = opposite/hypotenuse.

Front

How do you find the missing side using the sine function?

Back

Rearrange the sine formula: opposite = hypotenuse * sin(angle).

Front

What is the formula for finding the adjacent side using cosine?

Back

The formula is: cos(angle) = adjacent/hypotenuse.

Front

How do you find the missing side using the cosine function?

Back

Rearrange the cosine formula: adjacent = hypotenuse * cos(angle).