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TRIG VOCABULARY Chapter 3

Across
The only possible difference between the trig functions of an angle and its reference angle
This type of velocity is the ratio of theta in radians and time
Pi times two radians represents one of these
This distance from (1,0) to (x,y), is the same as the radian measure of theta
The relationship of linear and angular velocity is the product of angular velocity and this
Pi times diameter calculates this for a circle
5,280 feet
Angular velocity
This type of velocity is the ratio of arc length and time
Tangent and cotangent have unrestricted ___
Down
The area of this is calculated by finding the product of one-half the radius squared and theta
The domains of Sine and Cosine are this
Founder of trigonometry
Creating this type of circle helps make the trig functions easier to understand
The positive acute angle between the terminal side of theta and the x-axis
To apply algebra to trig "real numbers" are needed not degrees so angles must be measured in this
To convert radians to degrees multiply by 180 and divide this
Twice the sin of half theta
The ratio of surface or arc length and the radius finds this in radians