Results are out! Find what you Get quick advice or join the chat
Hey! Sign in to get help with your study questionsNew here? Join for free to post

C4 Edexcel Mock Paper Question 5

Announcements Posted on
Universities give advice on how to end your personal statement 19-11-2015
  1. Offline

    I've done part 5(a) for the question, but I'm stuck with the rest! Please can someone explain?
    I've added a link to the paper.

  2. Offline

    b) When you work this out, you'll need to expand cos(2t). Get this in terms of sin^2 t only, then rearrange to get a quadratic in sin(t) that you can solve

    c) Follows from b

    d) You have y=sin(2t)=2sin(t)cos(t). You can replace cos(t) with x, then use sin^2 t + cos^2 t = 1 to get sin(t) in terms of cos(t), and hence in terms of x. Remember that when you do this, you'll have to consider whether you are taking the positive or genative square root.

    e) Similar to the one before, but check again whether you need to use the positive or negative square root.
  3. Offline

    b) you've got an equation in terms of t that is equal to dy/dx

    dy/dx = 0

    so "your equation with t" = 0, solve for t.

    c) use what they gave you with your original equations. x = cost(t) y = sin(2t) with the values of t that you get above.


Submit reply


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?
  2. this can't be left blank
    this email is already registered. Forgotten your password?
  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 joining you agree to our Ts and Cs, privacy policy and site rules

  2. Slide to join now Processing…

Updated: April 20, 2012
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

Today on TSR

Ending your personal statement with a bang

Admissions experts tell you how

Do you have a part time job?
Study resources
Quick reply
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.