Trig Ratios

Front

What is the definition of Trigonometric Ratios?

Back

Trigonometric ratios are the ratios of the lengths of the sides of a right triangle to the angles of the triangle. The primary ratios are sine, cosine, and tangent.

Front

What is the sine ratio?

Back

Sine (sin) is the ratio of the length of the opposite side to the length of the hypotenuse in a right triangle.

Front

What is the cosine ratio?

Back

Cosine (cos) is the ratio of the length of the adjacent side to the length of the hypotenuse in a right triangle.

Front

What is the tangent ratio?

Back

Tangent (tan) is the ratio of the length of the opposite side to the length of the adjacent side in a right triangle.

Front

From angle C, what side is AB in triangle ABC?

Back

Opposite side.

Front

If you are given the hypotenuse and an adjacent side, which trig function should you use?

Back

Cosine.

Front

If you are given the two sides that are not the hypotenuse, which trig function should you use?

Back

Tangent.

Front

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

Back

Use the appropriate trig function (sin, cos, or tan) based on the known sides and angles.

Front

What is the formula for sine?

Back

sin(θ) = opposite/hypotenuse.

Front

What is the formula for cosine?

Back

cos(θ) = adjacent/hypotenuse.