Unit Circle Flashcard

Front

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

Back

The order 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.

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 radians and degrees?

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).