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# Current Year 13 Thread (2013/14) - Mark I Watch

1. (Original post by usycool1)
Does HIV really cause AIDS? is the question.
Sounds good. *feeling I should have done an EPQ now*
(Original post by usycool1)

20
Wow!

(Original post by mynameisntbobk)
Biology coursework is taking way longer than anticipated
Oh
2. patiently awaiting for the end of half term so I can submit my UCAS application
3. Literally bored of waiting to hear back from universities already

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4. (Original post by Lucy96)
Literally bored of waiting to hear back from universities already

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Any offers yet?
5. (Original post by Paparazzo)
Any offers yet?

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6. (Original post by Lucy96)

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Congrats!

7. (Original post by Lucy96)
Literally bored of waiting to hear back from universities already

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This.
8. (Original post by Paparazzo)
Congrats!

What's the pic meant to mean?

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9. (Original post by Paparazzo)
patiently awaiting for the end of half term so I can submit my UCAS application
Where are you applying?
10. (Original post by Paparazzo)
Congrats!

Haha thank you
(Original post by CharlieBoardman)
This.
I genuinely can't cope any longer

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11. (Original post by Blueray2)
Wow! I can imgaine that will get the PS tutors all excited over you
Ha, thanks!

(Original post by keromedic)
Sounds good. *feeling I should have done an EPQ now*

Wow!
12. (Original post by usycool1)

find dy/dx in terms of y when

x = 5sin3y

i've rearranged to make y the subject...

so y = 1/3sin^-1(x/5)

then i've differentiated and subbed x back in but i'm not getting the right answer

Spoiler:
Show
1/15sec3y

Thank you

EDIT - Neverrrrmindddddd I was being silly
13. (Original post by g.k.galloway)

find dy/dx in terms of y when

x = 5sin3y

i've rearranged to make y the subject...

so y = 1/3sin^-1(x/5)

then i've differentiated and subbed x back in but i'm not getting the right answer

Spoiler:
Show
1/15sec3y

Thank you

Would you not just do dx/dy then do 1/dx/dy?
14. (Original post by keromedic)
Sounds good. *feeling I should have done an EPQ now*
I did one too, they are really interesting
15. (Original post by g.k.galloway)

find dy/dx in terms of y when

x = 5sin3y

i've rearranged to make y the subject...

so y = 1/3sin^-1(x/5)

then i've differentiated and subbed x back in but i'm not getting the right answer

Spoiler:
Show
1/15sec3y

Thank you
dy/dx=1/dx/dy. Using this rule just differentiate 5sin3y with respects to y and divide 1 by that answer.
16. (Original post by mynameisntbobk)
Would you not just do dx/dy then do 1/dx/dy?
You have got to be kidding me...why didn't I think of that
17. (Original post by Dilzo999)
dy/dx=1/dx/dy. Using this rule just differentiate 5sin3y with respects to y and divide 1 by that answer.
Now I feel sillyyyyyy

Thanks though
18. (Original post by g.k.galloway)
You have got to be kidding me...why didn't I think of that

Haha its fine minor errors
19. (Original post by Pandora.)
Where are you applying?
20. I need to finish my personal statement but I am really struggling with what to fill the last 1,000 characters with

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