Higher Maths CfE 2015-2016

OP

We have done:

The straight line
Composition of Functions
Graphs of Functions
IN PROCESS OF Differentiation (sucks)
Polynomials
Quadratics
Addition Formulae
Vectors
The Wave function

What's addition formulae ?

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Reply 61

Jeff548

3

Original post by qasim-98

What's addition formulae ?

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stuff like Cos(A-B)=?

Reply 62

Jeff548

3

Original post by qasim-98

What's addition formulae ?

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How did you find the topic Recurrence Relations? Is it hard? Because apparently that was one of the controversial questions from last year...

Also the same thing for the functions and graphs topic? How did that go?

In my opinion, straight lines and polynomials are pretty straight forward but you always get the odd SQA question just to screw you over :smile:

Reply 63

qasim-98

OP

3

Original post by Jeff548

How did you find the topic Recurrence Relations? Is it hard? Because apparently that was one of the controversial questions from last year...

Also the same thing for the functions and graphs topic? How did that go?

In my opinion, straight lines and polynomials are pretty straight forward but you always get the odd SQA question just to screw you over :smile:

The recurrence relation question last year wasn't even that hard, I took a few minutes reading it too find clues but I honestly didn't find it hard. I think you got 6 marks for it, just for finding 2 limits, but the other questions were quite difficult.

Yeah, the exam seemed to be more literacy based as well, I don't get why though, it's maths not english. Besides I'm positive this years paper will be fair, I'm actually looking forward to it.

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Reply 64

qasim-98

OP

3

Anyone got their prelims this month for maths ? My schools getting S5 to do theirs in November, wonder if schools were the same

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Reply 65

bb208

Original post by qasim-98

Anyone got their prelims this month for maths ? My schools getting S5 to do theirs in November, wonder if schools were the same

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I have a unit assessment coming up soon , but all our prelims will be mid-January :biggrin:

Reply 66

qasim-98

OP

3

Original post by bb208

I have a unit assessment coming up soon , but all our prelims will be mid-January :biggrin:

We did logs today and I think this is the part where higher starts messing up your head..

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Reply 67

bb208

Original post by qasim-98

We did logs today and I think this is the part where higher starts messing up your head..

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Haha same here :biggrin:

but our teacher only introduced it today and basically we only done the changing the subject of the formula part, which was okay so far but as we are in higher maths then i am expecting it to become 10x harder :biggrin:

what would you say is your weakest topic?

Reply 68

Jism1495

I know how to show that x+2a is a factor but how would I could about showing that the other factors are, having trouble because of the a part

Reply 69

qasim-98

OP

3

Original post by Jism1495

I know how to show that x+2a is a factor but how would I could about showing that the other factors are, having trouble because of the a part

Basically factorise it using synthetic division, so you know (x + 2a) = 0 which gives you -2a as a factor. After you get the factor proven (remainder =0) , factorise the quotient which will give rise to your other factors. So you hve (x + 2a) as one factor, the other will be derived from your quotient.

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Reply 70

Jism1495

Original post by qasim-98

Basically factorise it using synthetic division, so you know (x + 2a) = 0 which gives you -2a as a factor. After you get the factor proven (remainder =0) , factorise the quotient which will give rise to your other factors. So you hve (x + 2a) as one factor, the other will be derived from your quotient.

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I don't know how to synthetic divide it due to the a's in the equation, like do I have to get rid of them first or

Reply 71

qasim-98

OP

3

Original post by Jism1495

I don't know how to synthetic divide it due to the a's in the equation, like do I have to get rid of them first or

I'm going to do it for you, il post it up soon.

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Reply 72

Jeff548

3

No idea how to do this question. I know unit vectors have a magnitude of 1 but I couldn't get the same answer, HELP! Btw the mark scheme says it is B (1).

Really appreciate it if you could show some working or walk me through it????

Reply 73

alana_p

10

Original post by JP298

If anyone needs any help in the Higher Maths course, just quote me. More than happy to help! :biggrin:

(Doing Advanced Higher this year)

Any good at trig and up for possibly helping me :s-smilie:

Reply 74

JP298

11

Original post by alana_p

Any good at trig and up for possibly helping me :s-smilie:

Sure, no problem. What do you need help with?

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Reply 75

alana_p

10

Original post by JP298

Sure, no problem. What do you need help with?

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"What is the value of cos 5pi/3 - tan 7pi/4"

I think i could use the CAST diagram(?) but I'm not really sure how that works, and I've tried other methods but i know I'm doing it wrong because I've got the answer. If you could explain to me how to do it that would be great. According to the marking scheme, the answer is 3/2.

Reply 76

JP298

11

Original post by alana_p

"What is the value of cos 5pi/3 - tan 7pi/4"

I think i could use the CAST diagram(?) but I'm not really sure how that works, and I've tried other methods but i know I'm doing it wrong because I've got the answer. If you could explain to me how to do it that would be great. According to the marking scheme, the answer is 3/2.

Hey, ok you were right thinking to use the cast diagram. So that's great! To help you understand it you need to know how each trigonometric function looks like on a graph, so sine, cos and tan is what you need to know for higher. Here's a link of an explanation of how the diagram works: http://youtu.be/tFBQ2YMdfhU

http://youtu.be/zGCnBgyM9kQ

Then take a look at some examples in the next video, there's no need to watch the whole video if you don't want to. I personally do not write in the triangles that he does but simply visualise each graph and remember when it is at a positive and negative value. I've drawn an example on my solutions with the cos graph. Just quote me if you still don't understand anything!

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Reply 77

JP298

11

ImageUploadedByStudent Room1452380151.958298.jpg

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Reply 78

alana_p

10

Original post by JP298

Hey, ok you were right thinking to use the cast diagram. So that's great! To help you understand it you need to know how each trigonometric function looks like on a graph, so sine, cos and tan is what you need to know for higher. Here's a link of an explanation of how the diagram works: http://youtu.be/tFBQ2YMdfhU

http://youtu.be/zGCnBgyM9kQ

Then take a look at some examples in the next video, there's no need to watch the whole video if you don't want to. I personally do not write in the triangles that he does but simply visualise each graph and remember when it is at a positive and negative value. I've drawn an example on my solutions with the cos graph. Just quote me if you still don't understand anything!

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That's great! thank you :smile:

Reply 79

qasim-98

OP

3