Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

hardequalsmath

  • 2 years ago

cos(2y)cos(y) - sin(2y)sin(y)

  • This Question is Closed
  1. dan815
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    http://www.maths.manchester.ac.uk/~cds/internal/tables/trig.pdf

  2. dan815
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    try some other trig identities in there if that doesnt simplify it

  3. hardequalsmath
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    so would it be cos2A * sin2A - 2 sinA * cosA?

  4. dan815
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    it will simplify to cos(3y)

  5. hayden4290
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    just plug it in ur calc matway.com is a great one .... cos(3y)

  6. dan815
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1373582879587:dw|

  7. hardequalsmath
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    thanks

  8. 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