C2 Trigonometry - Using Quadrant rule

I'm doing the C2 paper on 22/05/2014 and have been looking at the trigonometry section today. Is it necessary for us to know the quadrant rule? I just find it stupid and can much more easily do it from drawing out the graphs.

Reply 1

Super199

20

No you don't it's up to you which one you want to do. I personally prefer the quadrant rule.

Reply 2

Ilovemaths96

13

Original post by bbadonde2

I'm doing the C2 paper on 22/05/2014 and have been looking at the trigonometry section today. Is it necessary for us to know the quadrant rule? I just find it stupid and can much more easily do it from drawing out the graphs.

Are you referring to cast? If so i agree with you it's rubbish.

Reply 3

bbadonde2

OP

4

Original post by Ilovemaths96

Are you referring to cast? If so i agree with you it's rubbish.

Yeah they call it case as well. I prefer to do it by the graphs, however, the graphs need to be nice and tidy.

Reply 4

Kvothe the Arcane

20

Original post by bbadonde2

Yeah they call it case as well. I prefer to do it by the graphs, however, the graphs need to be nice and tidy.

Not really. A rough sketch will suffice.

Reply 5

mightyfrog2_10

14

Original post by bbadonde2

I'm doing the C2 paper on 22/05/2014 and have been looking at the trigonometry section today. Is it necessary for us to know the quadrant rule? I just find it stupid and can much more easily do it from drawing out the graphs.

I would use the graph method, I think its faster and nope you don't have to know the quadrant rule.

(edited 10 years ago)

C2 Trigonometry - Using Quadrant rule

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