Unit Circle & Trig Functions

Front

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

Back

The order is \(\left(\cos\theta,\sin\theta\right)\).

Tags

CCSS.HSF.TF.A.2

Front

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

Back

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

Tags

CCSS.HSF.TF.A.2

Front

What is the degree equivalent to \(\frac{3\pi}{2}\)?

Back

270 degrees.

Tags

CCSS.HSF.TF.A.1

Front

What are the coordinates of 180° on the unit circle?

Back

The coordinates are \((-1, 0)\).

Tags

CCSS.HSF.TF.A.2

Front

In which quadrants is cosθ positive?

Back

Cosθ is positive in the 1st and 4th quadrants.

Tags

CCSS.HSF.TF.A.2

Front

What is the sine of 90°?

Back

The sine of 90° is 1.

Tags

CCSS.HSG.SRT.C.7

Front

What is the cosine of 0°?

Back

The cosine of 0° is 1.

Tags

CCSS.HSF.TF.A.2

Front

What is the tangent of 45°?

Back

The tangent of 45° is 1.

Tags

CCSS.HSG.SRT.C.7

Front

What are the coordinates of 90° on the unit circle?

Back

The coordinates are \((0, 1)\).

Tags

CCSS.HSF.TF.A.2

Front

What is the reference angle for 210°?

Back

The reference angle is 30°.