Unit Circle Flashcard

Front

What is the order of the coordinate pairs for the points on the Unit Circle?

Back

The order of the coordinate pairs is (cos(θ), sin(θ)).

Front

True or False: Only the cosine trig function is positive in Quadrant II.

Back

False. In Quadrant II, sine is positive while cosine is negative.

Front

How many radians make up a SEMICIRCLE?

Back

Front

True or False: All trig functions are positive in Quadrant IV.

Back

False. In Quadrant IV, only cosine and secant are positive.

Front

What is the value of sin(90°)?

Back

sin(90°) = 1.

Front

What is the value of cos(0°)?

Back

cos(0°) = 1.

Front

What is the value of tan(45°)?

Back

tan(45°) = 1.

Front

What is the relationship between degrees and radians?

Back

Front

What are the coordinates of the point at 180° on the Unit Circle?

Back

The coordinates are (-1, 0).

Front

What are the coordinates of the point at 270° on the Unit Circle?

Back

The coordinates are (0, -1).