Welcome :: Homework Help and Answers :: Mathskey.com

Recent Visits

Simplify 2cos^2x - sinx

1 Answer

The expression is 2cos²x - sinx

=2 (1- sin²x) - sinx [Using pythagorean identity: cos²x = 1-sin²x]

= 2 - 2sin²x - sinx

answered Jun 17, 2014 by joly Scholar
edited Jul 31, 2014 by bradely

...