Online Test Banks
Score higher
See Online Test Banks
eLearning
Learning anything is easy
Browse Online Courses
Mobile Apps
Learning on the go
Explore Mobile Apps
Dummies Store
Shop for books and more
Start Shopping

Even-Odd Identities in Trigonometric Functions

Part of the Pre-Calculus Workbook For Dummies Cheat Sheet

All functions, including trig functions, can be described as being even, odd, or neither. Knowing whether a trig function is even or odd can help you simplify an expression. These even-odd identities are helpful when you have an expression where the variable inside the trig function is negative (such as –x). The even-odd identities are as follows:

sin(–x) = –sinx csc(–x) = –cscx
cos(–x) = cosx sec(–x) = secx
tan(–x) = –tanx cot(–x) = –cotx
  • Add a Comment
  • Print
  • Share
blog comments powered by Disqus

SERIES
Pre-Calculus Workbook For Dummies Cheat Sheet

Advertisement

Inside Dummies.com

Dummies.com Sweepstakes

Win $500. Easy.