Intro to Trig Week One Practice

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

Negative angles are measured in which direction from standard position?

Back

Clockwise.

Front

Positive angles are measured in which direction from standard position?

Back

Counterclockwise.

Front

What is the reference angle for 275°?

Back

85°.

Front

Which quadrant does the terminal side of 400 degrees end up in?

Back

Quadrant 1.

Front

What is the standard position of an angle?

Back

The standard position of an angle is when its vertex is at the origin and its initial side lies along the positive x-axis.

Front

How do you find the reference angle for angles greater than 360°?

Back

Subtract 360° from the angle until it is between 0° and 360°, then find the reference angle.

Front

What is the reference angle for 150°?

Back

30°.

Front

What is the relationship between angles in different quadrants?

Back

Angles in different quadrants can have the same reference angle but different signs for their sine, cosine, and tangent values.

Front

How do you convert a negative angle to a positive angle?

Back

Add 360° to the negative angle until it is positive.