Quantcast

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

Catsarecool97

Verify that sin(x+pi/2)=cosx

  • 9 months ago
  • 9 months ago

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

    use sin(A+B) formula

    • 9 months ago
  2. primeralph
    Best Response
    You've already chosen the best response.
    Medals 0

    |dw:1372182326719:dw|

    • 9 months ago
  3. Catsarecool97
    Best Response
    You've already chosen the best response.
    Medals 0

    Wait what?

    • 9 months ago
  4. AravindG
    Best Response
    You've already chosen the best response.
    Medals 1

    do you know sin(A+B) expansion?

    • 9 months ago
  5. Catsarecool97
    Best Response
    You've already chosen the best response.
    Medals 0

    yes. sin(x+y)=sinxcosy+cosxsiny

    • 9 months ago
  6. AravindG
    Best Response
    You've already chosen the best response.
    Medals 1

    ok here y=pi/2

    • 9 months ago
  7. AravindG
    Best Response
    You've already chosen the best response.
    Medals 1

    substitute and put values

    • 9 months ago
  8. Catsarecool97
    Best Response
    You've already chosen the best response.
    Medals 0

    alright so. sinxcospi/2+cosxsinpi/2

    • 9 months ago
  9. AravindG
    Best Response
    You've already chosen the best response.
    Medals 1

    yep

    • 9 months ago
  10. AravindG
    Best Response
    You've already chosen the best response.
    Medals 1

    sin pi/2= ... cos pi/2=....

    • 9 months ago
  11. primeralph
    Best Response
    You've already chosen the best response.
    Medals 0

    ?

    • 9 months ago
  12. Catsarecool97
    Best Response
    You've already chosen the best response.
    Medals 0

    sin=1 cos=0?

    • 9 months ago
  13. Catsarecool97
    Best Response
    You've already chosen the best response.
    Medals 0

    I'm confused now

    • 9 months ago
  14. AravindG
    Best Response
    You've already chosen the best response.
    Medals 1

    yes

    • 9 months ago
  15. primeralph
    Best Response
    You've already chosen the best response.
    Medals 0

    You know the formula. Use the formula?

    • 9 months ago
  16. AravindG
    Best Response
    You've already chosen the best response.
    Medals 1

    sin pi/2=1 cos pi/2=0

    • 9 months ago
  17. AravindG
    Best Response
    You've already chosen the best response.
    Medals 1

    Put the vales there

    • 9 months ago
  18. AravindG
    Best Response
    You've already chosen the best response.
    Medals 1

    *values

    • 9 months ago
  19. AravindG
    Best Response
    You've already chosen the best response.
    Medals 1

    sinxcospi/2+cosxsinpi/2

    • 9 months ago
  20. Catsarecool97
    Best Response
    You've already chosen the best response.
    Medals 0

    so sinxcos0+cosxsin1?

    • 9 months ago
  21. Catsarecool97
    Best Response
    You've already chosen the best response.
    Medals 0

    how does this equal cos?

    • 9 months ago
  22. AravindG
    Best Response
    You've already chosen the best response.
    Medals 1

    sinx *0+cosx *1=....

    • 9 months ago
  23. primeralph
    Best Response
    You've already chosen the best response.
    Medals 0

    |dw:1372182809686:dw|

    • 9 months ago
  24. Catsarecool97
    Best Response
    You've already chosen the best response.
    Medals 0

    oh! Thank you both!

    • 9 months ago
  25. AravindG
    Best Response
    You've already chosen the best response.
    Medals 1

    yw :)

    • 9 months 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...

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.