Trig Flashcard Review (Math 3)

Front

What are coterminal angles?

Back

Coterminal angles are angles that share the same terminal side when drawn in standard position. They can be found by adding or subtracting multiples of 360° (or 2π radians) to/from the angle.

Front

How do you find a negative coterminal angle for a given angle?

Back

To find a negative coterminal angle, subtract 360° (or 2π radians) from the given angle until the result is negative.

Front

What is the reference angle?

Back

The reference angle is the acute angle formed by the terminal side of an angle and the x-axis. It is always positive and is used to find the values of trigonometric functions.

Front

How do you determine the reference angle for an angle in Quadrant II?

Back

For an angle in Quadrant II, the reference angle is found by subtracting the angle from 180°.

Front

Which trigonometric ratios are positive in Quadrant I?

Back

In Quadrant I, all trigonometric ratios (sine, cosine, and tangent) are positive.

Front

Which trigonometric ratios are positive in Quadrant II?

Back

In Quadrant II, sine is positive, while cosine and tangent are negative.

Front

Which trigonometric ratios are positive in Quadrant III?

Back

In Quadrant III, tangent is positive, while sine and cosine are negative.

Front

Which trigonometric ratios are positive in Quadrant IV?

Back

In Quadrant IV, cosine is positive, while sine and tangent are negative.

Front

How do you convert radians to degrees?

Back

To convert radians to degrees, multiply the radian measure by 180/π.

Front

What is the degree measure of π/2 radians?

Back

The degree measure of π/2 radians is 90°.