Agenda Notes : (no handout, no calculator) –Reference Angles –Unit Circle –Coterminal Angles Go over test Go over homework Homework.

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Radian Measure and Coterminal Angles

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Presentation transcript:

Agenda Notes : (no handout, no calculator) –Reference Angles –Unit Circle –Coterminal Angles Go over test Go over homework Homework.

initial side: is always the positive x-axis terminal side Positive angles are measured counterclockwise. Negative angles are measured clockwise. Angles in standard position

Reference Angles Angle in standard position initial side terminal side

Reference Angles

Coterminal Angles Definition: Two angles with the same initial and terminal side

Coterminal Angles We can have infinitely many positive AND negative coterminal angles. For degrees, add 360° or subtract 360° For radians, add 2 π or subtract 2 π

Examples-Degrees

Examples-Radians

Homework Go over test Go over last night’s homework Pg 381:1,2,25-42all, 49-52all