Standard Position, Coterminal and Reference Angles-!!
coterminal angles
two angles that have the same terminal side.
Quadrantal angle
- if the terminal side of an angle lies on the axis (like a 90 or 180 degree angle).
initial side
- the ray on the x-axis of an angle in standard position.
terminal side
- the ray that rotates in an angle in standard position.
-250 degrees
Find largest negative angle cotermina1 angle to 470 degrees
-200 degrees
Find largest negative cotermina1 angle to 160 degrees
260 degrees
Find smallest positive cotermina1 angle to -820 degrees
60 degrees
Find the reference angle of -480 degrees
reference angle
an acute angle formed by the terminal side of the given angle and the x-axis.
clockwise angle measurement
the measurement of the angle is negative
Counterclockwise angle measurement
the measurement of the angle is positive
standard position
- an angle is in standard postion if its vertex is located at the origin and one ray is on the positive x-axis.