1 / 8

initial side: is always the positive x-axis

90° -270°. initial side: is always the positive x-axis. terminal side. 180° -180°. 0 °, 360° -360°. 270° -90°. Positive angles are measured counterclockwise. Negative angles are measured clockwise. Coterminal Angles. We can have infinitely many positive AND negative coterminal angles.

wallye
Télécharger la présentation

initial side: is always the positive x-axis

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 90° -270° initial side: is always the positive x-axis terminal side 180° -180° 0°, 360° -360° 270° -90° Positive angles are measured counterclockwise. Negative angles are measured clockwise.

  2. Coterminal Angles We can have infinitely many positive AND negative coterminal angles. For degrees, add 360° for positive coterminal angles, subtract 360° for negative coterminal angles. Example: Find a negative coterminal angle for 423°. answer: -297°

  3. Converting • To convert from degrees to radians: multiply by • To convert from radians to degrees: • multiply by • Example: Convert to radians

  4. Reference Angles • Sketch the angle • Draw a line from the terminal side to the X-Axis • (never to y-axis) to create a right triangle • 3. Subtract to find size of reference angle, answer is • always positive and between 0° and 90°.

  5. Trig Functions – Right Triangles Identifying the legs is relative to the angle hypotenuse (hyp) hypotenuse (hyp) opposite (opp) adjacent (adj) adjacent (adj) opposite (opp) SOH-CAH-TOA

  6. all sin tan cos How to remember which are positive where: All Spiders Taste Crunchy A: all S: sin T: tan C: cos

  7. Trig Functions First, sketch the point. Second, create a right triangle always using the x-axis for one of the legs. Third, label the legs and find the hypotenuse. . Find the value for the trig functions paying attention to the quadrant the point is in. 13 12 5

More Related