A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

cos(pi/2-x)=sin(x) True or False

  • This Question is Closed
  1. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    false, doesn't work out

  2. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    false

  3. zzr0ck3r
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    \(\cos(A-B) = \cos(A)\cos(B)+\sin(A)\sin(B)\) So in fact \(\cos(\dfrac{\pi}{2}-x)=\cos(\dfrac{\pi}{2})\cos(x)+\sin(\dfrac{\pi}{2})\sin(x)=0*\cos(x)+1*\sin(x)=\sin(x)\)

  4. zzr0ck3r
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    @plohrb @Dwayne_Johnson This is the problem with just giving answers...

  5. freckles
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    this is also cofunction identity compare cos(pi-x) 's ratio and sin(x)'s ratio |dw:1441062161511:dw|

  6. dinamix
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    @Reid448 its true and we find it in (Equilateral triangle ,Triangle-based) right mr @freckles

  7. freckles
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    equilateral triangle is a triangle with each of its angle measurements equal to 60 deg

  8. dinamix
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    i mean should be based and equilateral

  9. dinamix
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    the triangle

  10. zzr0ck3r
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    thanks @freckles that is cool, I always have to look it up.

  11. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

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...

23

  • 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.