MT 125 Intro to Unit Circle Quiz Chapter 5.1 & 5.2

What is the common endpoint of two rays that form an angle called?

What angle between the horizontal and line from the object to the observer’s eye that positioned lower than observer?

Which trig function is the reciprocal of the sine function: on the unit circle?

To convert between degrees and radians, you ?

What is the side of an angle from which rotation begins?

The secant, tangent, and cosecant are all reciprocals of other functions.

What is the measure of the acute angle formed by the terminal side of the angle and the horizontal axis?

What position of an angle having the vertex at the origin and the initial side along the positive x-axis?

What is the union of two rays having a common endpoint?

True or false. We can define trigonometric functions as ratios of the side lengths of a right triangle.

What is the description of an angle measured clockwise from the positive x-axis?

Which trig function is the quotient of the sine and cosine on the unit circle?

In a right triangle, what is the side most distant from a given angle?

What is the side of a right triangle opposite the right angle called?

What unit of measure describing the size of an angle as one-360th of a full revolution of a circle?

The length of a circular arc is a fraction of the circumference of the entire circle.

What Pythagorean Theorem states that the square of the cosine of a side plus the square of the sine equal one?

Which trig function is the x-value of the point on unit circle corresponding to a given angle?

True or False. We can find coterminal angles by adding or subtracting 360° or 2π.

Which trig function is the y-value of the point on a unit circle corresponding to a given angle?

Which angle has a description of positive and negative angles in standard position sharing the same terminal side?

True or false. Right-triangle trigonometry facilitates the measurement of inaccessible heights and distances.

Which trig function is the reciprocal of the cosine function on the unit circle?

The signs of the sine and cosine are determined from the x- and y-values in the quadrant of the original angle.

What is a circle with a center at (0,0) (0,0) and radius 1 called?