1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Simplifying a trigonometric product

  1. Oct 2, 2012 #1
    Was just double checking if we can simplify this in the following way,

    ∫ sinx * √(1 + cos2x) dx = ∫ sinx * (1 + cosx) dx
  2. jcsd
  3. Oct 2, 2012 #2


    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Gold Member


    Is [itex]\sqrt{3^2+4^2}=7\ ?[/itex] No !

    [itex]\sqrt{3^2+4^2}=\sqrt{25}=5\ .[/itex].

    To solve that integral, use substitution .

    Ask your self, what's the derivative of cos(x) ?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook