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1. Hey guys,

I've got my C3 exam in June and I have a question.

What is cos^2(theta) equal to?

Like is it (cos(cos theta) or something else. Thanks in advance.
2. (Original post by edsjay23)
Hey guys,

I've got my C3 exam in June and I have a question.

What is cos^2(theta) equal to?

Like is it (cos(cos theta) or something else. Thanks in advance.
3. (Original post by reubenkinara)
Thank you so much for your reply, just wondering though is it for example;
Cos^2(15) = cos(15)*cos(15)=(2+sqrt3)/4
4. (Original post by edsjay23)
Thank you so much for your reply, just wondering though is it for example;
Cos^2(15) = cos(15)*cos(15)=(2+sqrt3)/4
Yes. Exactly.
5. (Original post by edsjay23)
Thank you so much for your reply, just wondering though is it for example;
Cos^2(15) = cos(15)*cos(15)=(2+sqrt3)/4
yes
6. (Original post by reubenkinara)
Yes. Exactly.
you legend
7. (Original post by TenOfThem)
yes
ty xD
8. (Original post by TenOfThem)
yes
I guess it'd be easier if it was written like this (cos15)^2), but is this not the right format?
9. (Original post by edsjay23)
I guess it'd be easier if it was written like this (cos15)^2), but is this not the right format?
It is the same

But not the usual format

It would not be easier since is clearly defined
10. (Original post by edsjay23)
I guess it'd be easier if it was written like this (cos15)^2), but is this not the right format?
You have one bracket like this ( and two like this )).

We don't use that notation to avoid anyone thinking it might be cos (15^2) or cos (225). If you had used the right number of brackets you would have avoided such confusion.
11. You kinda needed to know that for core 2 as well you know, OP.
12. (Original post by TenOfThem)
It is the same

But not the usual format

It would not be easier since is clearly defined
Oh right ty
13. (Original post by Mr M)
You have one bracket like this ( and two like this )).

We don't use that notation to avoid anyone thinking it might be cos (15^2) or cos (225). If you had used the right number of brackets you would have avoided such confusion.
Oh right yeah makes sense. Thanks for your help. Are you a teacher?
14. (Original post by Pride)
You kinda needed to know that for core 2 as well you know, OP.
Never taught it in class. Good I know now though haha
15. (Original post by edsjay23)
Oh right yeah makes sense. Thanks for your help. Are you a teacher?
Yes.
16. (Original post by Mr M)
Yes.
wp. Are you a level, uni level or other?
17. (Original post by edsjay23)
wp. Are you a level, uni level or other?
GCSE and A Level.
18. (Original post by Mr M)
GCSE and A Level.

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