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AQA AS FP1 Further Pure 1 15th June 2016 [Exam Discussion Thread]

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Original post by TheLifelessRobot

Here's the mark scheme, when you get the value of theta using the reflection matrix you get a completely different value for theta.

I did this paper yesterday and got theta as 75° - 150°/2 (with an enlargement of 2rt3)😕

Reply 21

Hjyu1

Original post by TheLifelessRobot

Here's the mark scheme, when you get the value of theta using the reflection matrix you get a completely different value for theta.

You need to use CAST method to get the right value for 2 theta otherwise the calculator only gives you principle values

Reply 22

TheLifelessRobot

Original post by Hjyu1

You need to use CAST method to get the right value for 2 theta otherwise the calculator only gives you principle values

Could you explain it to me in the context of this question?

Reply 23

username2137079

FP1 and stats S2 in the same morning. Non-stop exams from 9-12 lucky me :'(

Reply 24

rainbowtwist

Original post by Hjyu1

You need to use CAST method to get the right value for 2 theta otherwise the calculator only gives you principle values

What's the CAST method?

Reply 25

OturuDansay

Original post by rainbowtwist

What's the CAST method?

For that reflection Q:
Other correct alternatives’ include eg Enlargement sf: − 12, reflection in y= tan15x

They accept a lot of alternatives, you don't need to use the CAST method.

Reply 26

LaurenLovesMaths

How did everyone find the exam?

Reply 27

Hjyu1

It wasn't too bad did any one get tanx=root 3

Reply 28

TIF141

I actually think that was too horrible - where were the numerical methods, though...?

Reply 29

qeyoo

It wasn't a hard paper, I knew how to do everything, just ****ed it all up. None of my numbers worked, and that meant I couldn't finish question 9, because my answer to part a just would not work out.

Shall we say that all of my university aspirations have just been flushed down the drain?

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Reply 30

An1998

Found that harder than last years paper :frown:

Reply 31

An1998

Original post by Hjyu1

It wasn't too bad did any one get tanx=root 3

I got tanx=-1/root3, but i maybe wrong :/

Reply 32

Hjyu1

Original post by An1998

I got tanx=-1/root3, but i maybe wrong :/

Your talking about the matrix one where your answer would be right, I'm talking about the general solution part b

Reply 33

Olsmarto

What did everyone get for q in complex number question

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Reply 34

rainbowtwist

I couldn't do the tanx question and I couldn't find q 😂 hopefully I'll get method marks :/

Reply 35

bheaton

What did everyone get for their values of k? I got -0.5 and 2 I think. This was question 6 I believe

Reply 36

Physics Optimist

Was the 'q' question
w^2 +(4+i+q i)w +20 = 0

with w = p+2iq and w^* = p-2iq?

Reply 37

bheaton

Loved the matrix question anyone remember what they got for the last part of the question???

Reply 38

bheaton

Original post by Physics Optimist

Was the 'q' question
w^2 +(4+i+q i)w +20 = 0

with w = p+2iq and w^* = p-2iq?

Yes

Reply 39

Physics Optimist

Original post by bheaton

Yes

Thanks - this was the only one where I think I made a mistake. I got q as -7, -1 and 5. I didn't like 3 values and my Casio didn't agree with me :smile:

I think I have one sign error so a probable 1/5 marks?