Trig Ratios

Front

What is the definition of Trigonometry?

Back

Trigonometry is a branch of mathematics that studies the relationships between the angles and sides of triangles, particularly right triangles.

Front

What are the three primary trigonometric ratios?

Back

Sine, Cosine, and Tangent.

Front

Define Sine in terms of a right triangle.

Back

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

Front

Define Cosine in terms of a right triangle.

Back

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

Front

Define Tangent in terms of a right triangle.

Back

Tangent (tan) 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 Sine?

Back

Sine = Opposite / Hypotenuse.

Front

What is the formula for Cosine?

Back

Cosine = Adjacent / Hypotenuse.

Front

What is the formula for Tangent?

Back

Tangent = Opposite / Adjacent.

Front

If the hypotenuse is 10 and the opposite side is 6, what is the Sine of the angle?

Back

Sine = 6 / 10 = 0.6.

Front

If the hypotenuse is 10 and the adjacent side is 8, what is the Cosine of the angle?

Back

Cosine = 8 / 10 = 0.8.