Are sums and differences of angles 2U or 3U (1 Viewer)

[funki_ell]

Hey i just came across some formulas and i was wondering if anyone knew if Sums and Differences of angles are 2U or 3U, just dont want to learn them for the 2U paper if i don't have to. thanks.

 

[*Ninny-mole*]

Oh shit, um I don't even remember what they are....? Okay, hold up...

 

[*Ninny-mole*]

Okay, are you talking about integration (sums and differences of AREAS) or are you talking about some trigonometry crap that I can't remember? I'm not sure. If you are talking about integration, I have a hunch it might be 2U, but I'm really not sure so I would study it anyway. Um, if you are talking about anything else I can't help you until you remind me of what it is...

 

[pLuvia]

She's talking about things like
sinA+sinB=2sin([A+B]/2)cos([A-B]/2)
cosA+cosB=2cos([A+B]/2)cos([A-B]/2)

etc

Don't worry about these, these formulae are out of the syllabus, although they might ask you questions on these they will make you prove it first then tell you to use it

 

[funki_ell]

It was to do with trig but i've just asked someone else and they found out it was 3U. Thanks, sorry if i confused you.

 

[*Ninny-mole*]

Thanks, sorry if i confused you.

No dude, it was my bad. I'm the dumbshit who couldn't remember the topic.

 

[Riviet]

I believe they used to be in the 3 or 2 unit syllabus, but not anymore. BUT that doesn't mean you won't be examined on it. If they do, they will give you lead you through it so don't worry.

 

[SoulSearcher]

They were in the 3 unit syllabus a while back, not sure about 2 unit though.