Finding Side Lengths Using Trig

Front

What is the definition of the cosine function in a right triangle?

Back

The cosine function is defined as the ratio of the length of the adjacent side to the length of the hypotenuse.

Front

What is the definition of the sine function in a right triangle?

Back

The sine function is defined as the ratio of the length of the opposite side to the length of the hypotenuse.

Front

What is the definition of the tangent function in a right triangle?

Back

The tangent function is defined as the ratio of the length of the opposite side to the length of the adjacent side.

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 = Opposite/Hypotenuse, Cosine = Adjacent/Hypotenuse, Tangent = Opposite/Adjacent.

Front

How do you set up a cosine ratio to find a side length?

Back

Front

If you know the angle and the hypotenuse, how can you find the adjacent side using cosine?

Back

Front

What is the cosine of 37 degrees?

Back

The cosine of 37 degrees is approximately 0.7986.

Front

How do you set up a sine ratio to find a side length?

Back

Front

If you know the angle and the hypotenuse, how can you find the opposite side using sine?

Back

Front

What is the sine of 37 degrees?

Back

The sine of 37 degrees is approximately 0.6018.