Trig Ratio Basics

Front

What is the definition of tangent in a right triangle?

Back

Tangent (tan) is the ratio of the length of the opposite side to the length of the adjacent side.

Front

What is the sine ratio in a right triangle?

Back

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

Front

What is the cosine ratio in a right triangle?

Back

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

Front

If you know the lengths of the opposite and adjacent sides, which trig function do you use?

Back

You use the tangent function.

Front

What is the formula for sine?

Back

sinA = opposite/hypotenuse.

Front

What is the formula for cosine?

Back

cosA = adjacent/hypotenuse.

Front

What is the formula for tangent?

Back

tanA = opposite/adjacent.

Front

If sinZ = 5/13, what does this represent?

Back

This represents the ratio of the length of the opposite side to the hypotenuse for angle Z.

Front

How do you find the length of a side using sine?

Back

Use the formula sin(angle) = opposite/hypotenuse and rearrange to find the opposite side.

Front

How do you find the length of a side using cosine?

Back

Use the formula cos(angle) = adjacent/hypotenuse and rearrange to find the adjacent side.