1 / 5

Sum and Difference Identities

Sum and Difference Identities. Unit 5. Finding Exact Value . While doing this it is important to remember your 30, 45, and 60 degree angles. Also know each of there values in the different quadrants.

prince
Download Presentation

Sum and Difference Identities

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. Sum and Difference Identities Unit 5

  2. Finding Exact Value • While doing this it is important to remember your 30, 45, and 60 degree angles. Also know each of there values in the different quadrants. • The reference angle is always the angle between the terminal side and the x-axis. It will always be 30, 45, or 60.

  3. Sum and Difference for cosine • Cos (u + v) = (cos u)(cos v) – (sin u)(sin v) • Cos (u – v) = (cos u)(cos v) + (sin u)(sin v) • Example: Find exact value of cos 15

  4. Sum and difference of Sine • Sin (u + v) = (sinu)(cos v) + (cosu)(sin v) • Sin (u – v) = (sinu)(cos v) – (cos u)(sin v) • Example: Find exact value of sin15

  5. Sum and difference tangent • tan (u + v) = (tan u + tan v)/(1 – (tan u)(tan v)) • tan (u – v) = (tan u – tan v)/(1 + (tan u)(tan v)) • Find exact value of tan15

More Related