Hey there Sign in to join this conversationNew here? Join for free

C2 trig help please

Announcements Posted on
Study Help needs new mods! 14-04-2014
Post on TSR and win a prize! Find out more... 10-04-2014
    • Thread Starter
    • 0 followers
    Offline

    ReputationRep:
    Click image for larger version. 

Name:	help.png 
Views:	30 
Size:	10.7 KB 
ID:	148703

    Could someone help me work this out?
    i don't know what to do after sin/cos =2 sin
    • 2 followers
    Offline

    ReputationRep:
    (Original post by 0utdoorz)
    Click image for larger version. 

Name:	help.png 
Views:	30 
Size:	10.7 KB 
ID:	148703

    Could someone help me work this out?
    i don't know what to do after sin/cos =2 sin
    If you had  \dfrac{x}{y} = 2x
    what would you do to find y?

    Spoiler:
    Show
    you would first multiply by y to cancel out the denominator on the LHS
     x = 2xy
    Then you would divide through by x leaving
     1 = 2y
    and \dfrac{1}{2} = y
    • 13 followers
    Offline

    ReputationRep:
    (Original post by 0utdoorz)
    Click image for larger version. 

Name:	help.png 
Views:	30 
Size:	10.7 KB 
ID:	148703

    Could someone help me work this out?
    i don't know what to do after sin/cos =2 sin
    Multiply by cos theta , equate to zero and factorise.

Reply

Submit reply

Register

Thanks for posting! You just need to create an account in order to submit the post
  1. this can't be left blank
    that username has been taken, please choose another Forgotten your password?

    this is what you'll be called on TSR

  2. this can't be left blank
    this email is already registered. Forgotten your password?

    never shared and never spammed

  3. this can't be left blank

    6 characters or longer with both numbers and letters is safer

  4. this can't be left empty
    your full birthday is required
  1. By completing the slider below you agree to The Student Room's terms & conditions and site rules

  2. Slide the button to the right to create your account

    Slide to join now Processing…

    You don't slide that way? No problem.

Updated: May 17, 2012
Article updates
Reputation gems:
You get these gems as you gain rep from other members for making good contributions and giving helpful advice.