You are Here: Home >< Maths

Announcements Posted on
Would YOU be put off a uni with a high crime rate? First 50 to have their say get a £5 Amazon voucher! 27-10-2016
1. http://www.mei.org.uk/files/papers/2012_Jan_c4.pdf

its all of q8 but especially part 2, can someone give me the step by step as even mark scheme isnt making sense
2. You'll need to be a little more specific.
3. i get up to 3rd point of the mark scheme, then i dont get how we get to tan2 theta double angle from there, and from that i have no idea about the next part from that
4. (Original post by liverpool2044)
i get up to 3rd point of the mark scheme, then i dont get how we get to tan2 theta double angle from there, and from that i have no idea about the next part from that
Remember the identity that .

Now you know that your gradient of QP is . But from part (i) you know that .

So substitute this into your QP:

After some simplification and common denominators and cancelling common factors, etc...

But you know exactly what that identity is, so

Does this help at all?
5. (Original post by Zacken)
Remember the identity that .

Now you know that your gradient of QP is . But from part (i) you know that .

So substitute this into your QP:

After some simplification and common denominators and cancelling common factors, etc...

But you know exactly what that identity is, so

Does this help at all?
thank very helpful, its the few marks after too where it begins to ask about tpq can you help with that?
6. doesnt make sense
7. (Original post by liverpool2044)
thank very helpful, its the few marks after too where it begins to ask about tpq can you help with that?
if you extend the tangent line as far as the x axis and then consider the angles in the resulting triangle...

## Register

Thanks for posting! You just need to create an account in order to submit the post
1. this can't be left blank
2. this can't be left blank
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
1. Oops, you need to agree to our Ts&Cs to register

Updated: April 16, 2016
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.

This forum is supported by:
Today on TSR

Poll
Useful resources

### Maths Forum posting guidelines

Not sure where to post? Read here first

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams