Trig Ratios and Side Lengths FLASHCARD

Front

What is the definition of Trigonometric Ratios?

Back

Trigonometric ratios are the ratios of the lengths of the sides of a right triangle. They are used to relate the angles of the triangle to the lengths of its sides.

Front

What are the three primary trigonometric ratios?

Back

Sine (sin), Cosine (cos), and Tangent (tan).

Front

Define Sine (sin) in terms of a right triangle.

Back

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

Front

Define Cosine (cos) in terms of a right triangle.

Back

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

Front

Define Tangent (tan) in terms of a right triangle.

Back

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 formula for finding the sine of an angle?

Back

Sin(θ) = Opposite / Hypotenuse.

Front

What is the formula for finding the cosine of an angle?

Back

Cos(θ) = Adjacent / Hypotenuse.

Front

What is the formula for finding the tangent of an angle?

Back

Tan(θ) = Opposite / Adjacent.

Front

If sin(40°) = x/19, how do you solve for x?

Back

x = 19 * sin(40°).

Front

From angle C, which side is opposite to angle C?

Back

The side opposite to angle C is the side that does not touch angle C.