Trigonometric Ratios

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 definition of sine 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 definition of cosine in a right triangle?

Back

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

Front

What mnemonic helps remember the trigonometric ratios?

Back

Soh Cah Toa.

Front

If you know the opposite side and the hypotenuse, which trig function do you use?

Back

Sine.

Front

If you know the adjacent side and the hypotenuse, which trig function do you use?

Back

Cosine.

Front

If you know the opposite side and the adjacent side, which trig function do you use?

Back

Tangent.

Front

What is the formula for Sin(A)?

Back

Sin(A) = opposite/hypotenuse = a/c.

Front

What is the formula for Cos(A)?

Back

Cos(A) = adjacent/hypotenuse = b/c.

Front

What is the formula for Tan(A)?

Back

Tan(A) = opposite/adjacent = a/b.