Test Trig Ch 8 pt 1 Trig Functions

Front

What is a co-terminal angle?

Back

Co-terminal angles are angles that share the same terminal side when drawn in standard position. To find a co-terminal angle, you can add or subtract multiples of 360° (or 2π radians).

Front

Find the co-terminal angle to 150°.

Back

510° is a co-terminal angle to 150°.

Front

What is a reference angle?

Back

A reference angle is the acute angle formed by the terminal side of an angle and the x-axis. It is always positive and less than 90°.

Front

What is the reference angle for 245°?

Back

The reference angle for 245° is 65°.

Front

How do you convert radians to degrees?

Back

To convert radians to degrees, multiply the radian measure by \( \frac{180}{\pi} \).

Front

Back

Front

What is the sine function?

Back

The sine function, denoted as \( \sin \theta \), is the ratio of the length of the opposite side to the hypotenuse in a right triangle.

Front

What is the cosine function?

Back

The cosine function, denoted as \( \cos \theta \), is the ratio of the length of the adjacent side to the hypotenuse in a right triangle.

Front

What is the tangent function?

Back

The tangent function, denoted as \( \tan \theta \), is the ratio of the length of the opposite side to the adjacent side in a right triangle.

Front

Which trigonometric function is positive in quadrant IV?

Back

In quadrant IV, the cosine function \( \cos \theta \) is positive.