Unit 5 Review!

Front

What is the cosine function used for in right triangles?

Back

The cosine function relates the angle to the ratio of the length of the adjacent side to the hypotenuse.

Front

How do you set up the cosine function to find a missing side in a right triangle?

Back

cos(θ) = adjacent/hypotenuse.

Front

What is the value of cos(37) if the adjacent side is 14 and the hypotenuse is x?

Back

cos(37) = 14/x.

Front

What is the relationship between sine, cosine, and tangent in a right triangle?

Back

sin(θ) = opposite/hypotenuse, cos(θ) = adjacent/hypotenuse, tan(θ) = opposite/adjacent.

Front

What is the secant function?

Back

The secant function is the reciprocal of the cosine function: sec(θ) = 1/cos(θ).

Front

What is the value of sec(3π/2)?

Back

undefined.

Front

What does it mean for a trigonometric function to be undefined?

Back

A trigonometric function is undefined when its denominator is zero.

Front

What is the simplified form of sin²θ + cos²θ?

Back

1.

Front

How do you convert radians to degrees?

Back

Multiply the radian measure by 180/π.

Front

Convert -8π/5 radians to degrees.

Back

-288°.