Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing


Hi, i'm trying to solve this integral on this site : http://tutorial.math.lamar.edu/Classes/CalcI/SubstitutionRuleIndefinite.aspx. The first question of Example 2: sin(1-x)(2-cos(1-x))^4 dx and i substituted u=2-cos(1-x). So i solved for du= sin(1-x)dx but the author of the tutorial says it is du=-sin(1-x)dx. Since the derivative of cosx is -sinx then the two negatives become positive. Need some explanation why he still mainstains the negative infront of the sin. thanks

  • 2 years ago
  • 2 years ago

  • This Question is Closed
  1. anilorap
    Best Response
    You've already chosen the best response.
    Medals 0

    when u take the derivative of 2-cos(1-x)= -(-sin)(1-x)(-1) derivative of the inside too derivative of (1-x)

    • 2 years ago
  2. keira_lee
    Best Response
    You've already chosen the best response.
    Medals 1

    that's because the negative come from differentiate of ( 1- x ) that is -1

    • 2 years ago
  3. pokemon23
    Best Response
    You've already chosen the best response.
    Medals 2

    Today's my birthday :)

    • 2 years ago
    • Attachments:

See more questions >>>

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...


  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.