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# Any As/a-level maths exam vocabulary we should know? watch

1. For example real values means to leave it in surds/square root form right?

Are there any more maths exam vocabulary jargon that I should look out for? Is there a list?

I'm doing ocr maths As-level. Came across a trig question that told us to work out the exact value. My calculator gave me adecimal number, but the answer is (2 sq root 5)/ 5. Does it matter that I gave it as a decimal if it is ‘exact values’?
2. (Original post by JulieEdiz)
For example real values means to leave it in surds/square root form right?

Are there any more maths exam vocabulary jargon that I should look out for? Is there a list?

I'm doing ocr maths As-level. Came across a trig question that told us to work out the exact value. My calculator gave me adecimal number, but the answer is (2 sq root 5)/ 5. Does it matter that I gave it as a decimal if it is ‘exact values’?
If you give it in decimal, it's not an exact value, is it...? So exact answer means leaving it in terms of square roots/pi/whatever.
3. Exact value means you should leave it in surd form.
4. (Original post by Zacken)
If you give it in decimal, it's not an exact value, is it...? So exact answer means leaving it in terms of square roots/pi/whatever.

How would you work out if tan a=2, what are the exact values of sin a and cos a?

I did tan^-1 (2) to work out a but it does not give me any surd forms of the angle a.
5. (Original post by JulieEdiz)
How would you work out if tan a=2, what are the exact values of sin a and cos a?

I did tan^-1 (2) to work out a but it does not give me any surd forms of the angle a.
Draw a right angled triangle, mark the angle a - now you know that the opposite is and the adjacent is ; so the hypotenuse is . Now use the fact that is the opposite (2) over they hypotenuse () and I'm sure you can work out something similar for .
6. If you're doing Mechanics or Statistics, there is quite a bit yes,

Also fact: anything labelled as a "line" extends infinitely unless given within certain parameters
7. (Original post by Zacken)
Draw a right angled triangle, mark the angle a - now you know that the opposite is and the adjacent is ; so the hypotenuse is . Now use the fact that is the opposite (2) over they hypotenuse () and I'm sure you can work out something similar for .
Thank you very much!
8. (Original post by JulieEdiz)
Thank you very much!
Not a problem. Glad my explanation makes sense.
9. (Original post by Student403)
If you're doing Mechanics or Statistics, there is quite a bit yes,

Also fact: anything labelled as a "line" extends infinitely unless given within certain parameters
You might want to post that screenshot of the mechanics jargon thing-y, could be useful here!
10. (Original post by Zacken)
You might want to post that screenshot of the mechanics jargon thing-y, could be useful here!
Good idea! I would do stats but it's scattered all over the book

11. (Original post by Student403)
Good idea! I would do stats but it's scattered all over the book
Can't rep you, I've been trying for days now, but thanks!
12. (Original post by Zacken)
Can't rep you, I've been trying for days now, but thanks!
Cheers

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