Trig Functions Unit 4 Post Test Review

Front

What is a coterminal angle?

Back

Coterminal angles are angles that share the same terminal side when drawn in standard position. To find a coterminal angle, you can add or subtract multiples of 360 degrees (or 2π radians).

Front

Find a coterminal angle to 45 degrees.

Back

405 degrees is a coterminal angle to 45 degrees.

Front

What is the formula for tangent in terms of sine and cosine?

Back

tan(θ) = sin(θ) / cos(θ).

Front

Based on the unit circle, what is the value of tan?

Back

tan = y/x.

Front

What is the sine of π/2?

Back

sin(π/2) = 1.

Front

What is the reference angle?

Back

The reference angle is the acute angle formed by the terminal side of an angle and the x-axis.

Front

How do you find the reference angle for an angle in the second quadrant?

Back

Reference angle = 180° - θ.

Front

How do you find the reference angle for an angle in the third quadrant?

Back

Reference angle = θ - 180°.

Front

How do you find the reference angle for an angle in the fourth quadrant?

Back

Reference angle = 360° - θ.

Front

What is the value of sin(30 degrees)?

Back

sin(30 degrees) = 1/2.