Intro to Trigonometry

Front

What is the hypotenuse in a right triangle?

Back

The hypotenuse is the longest side of a right triangle, opposite the right angle.

Front

What is the ratio for Sine?

Back

Sine is defined as the ratio of the length of the opposite side to the length of the hypotenuse (Opp/Hyp).

Front

What is the opposite side in a right triangle?

Back

The opposite side is the side opposite to a given angle in a right triangle.

Front

What is the adjacent side in a right triangle?

Back

The adjacent side is the side next to a given angle in a right triangle, excluding the hypotenuse.

Front

What does SOH-CAH-TOA stand for?

Back

SOH-CAH-TOA is a mnemonic to remember the definitions of sine, cosine, and tangent: Sine = Opp/Hyp, Cosine = Adj/Hyp, Tangent = Opp/Adj.

Front

How do you find the cosine of an angle in a right triangle?

Back

Cosine is found by taking the ratio of the length of the adjacent side to the length of the hypotenuse (Adj/Hyp).

Front

What is the tangent ratio?

Back

Tangent is defined as the ratio of the length of the opposite side to the length of the adjacent side (Opp/Adj).

Front

Can SOH-CAH-TOA be used for non-right triangles?

Back

No, SOH-CAH-TOA is only applicable to right triangles.

Front

If the hypotenuse is 29 and the opposite side is 12, what is the sine of the angle?

Back

Sine = Opp/Hyp = 12/29.

Front

If the adjacent side is 20 and the hypotenuse is 29, what is the cosine of the angle?

Back

Cosine = Adj/Hyp = 20/29.