# Trigonometry Vocab Words

### Brandon Carroll

## Radians-

a unit of angle, equal to an angle at the center of a circle whose arc is equal in length to the radius

## Degrees-

a unit of measurement of angles, one three-hundred-and-sixtieth of the circumference of a circle

## Initial Side-

a stationary straight line that contains a point about which another straight line is rotated to form an angle

## Reference Angle-

the smallest angle between the terminal side and the x-axis

## Trig Ratios (Sine, Cosine, Tangent, Secant, Cosecant, Cotangent)-

the six trigonometric ratios relate the sides of a right triangle to its angles