Unit Circle & Trig Functions

Front

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

Back

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

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.

Front

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

Back

270 degrees.

Front

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

Back

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

Front

In which quadrants is cosθ positive?

Back

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

Front

What is the sine of 90°?

Back

The sine of 90° is 1.

Front

What is the cosine of 0°?

Back

The cosine of 0° is 1.

Front

What is the tangent of 45°?

Back

The tangent of 45° is 1.

Front

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

Back

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

Front

What is the reference angle for 210°?

Back

The reference angle is 30°.