Double angle formula and the other one

[andy456]

Do we need to know this for methods because the study design has this:

This area of study will include:
• review of algebra of polynomials, equating coefficients and solution of polynomial equations with
real coefficients of degree n having up to and including n real solutions;
• the relationship of ƒ(x ± y), ƒ(xy) and ƒ to values of ƒ(x) and ƒ(y) for different functions ƒ;
• logarithm laws and exponent laws, recognition of equivalent forms using compound and double
angle formulas for sine, cosine and tangent;

but then its not on our formula sheet nor in my textbook...
Do I need to learn them??

[sajib_mostofa]

Nope

[lachymm]

COMPLETELY OFF TOPIC...did you really get B+ A A for indonesian and only get a 33?

Man thats rough obviously your smart and vcaa only gives ya 33? Lucky for scaling buddy, how the hell did that work out? I though B+ mean around 35? And A's mean ur around 37?

[itolduso]

Nope

What about if you are asked in the exam? the study design says so.

[AzureBlue]

I thought that half/double/compound angle formulae etc. were in GMS/Specialist, not Methods.

[jasoN-]

indeed it is in spesh
only once did i see a question (not even in an exam) that required compound angle in methods

[JinXi]

COMPLETELY OFF TOPIC...did you really get B+ A A for indonesian and only get a 33?

Man thats rough obviously your smart and vcaa only gives ya 33? Lucky for scaling buddy, how the hell did that work out? I though B+ mean around 35? And A's mean ur around 37?

Lol thats nowhere near harsh, I got A/A/B+ on my Chinese Second Language Advanced and they gave me a big fat 23.... Lucky im doing 7 subejcts so it isn't counted. Sort of knew i failed that subject big time anyway, seeing as the longest conversation I had in chinese for the last 5 years or so was during the oral examination lol..

[Blakhitman]

Nope

What about if you are asked in the exam? the study design says so.

You don't need to memorise them for exam 1.

[yearningforsimplicity]

Nopee, I read earlier in the year in a vcaa bulletin that for methods "the memorisation of double angle and compound angle formulae is not required" so I don't think they'd test it in exam 1 :/ But if they do in exam 2, i'm dead :| lol

[AzureBlue]

You don't need to memorise them for exam 1.

Trigonometry is very useful, so you might as well, after all, there's not that much at all so it wouldn't be too much of a hassle to memorise... I'm not even in 3/4 yet and I'm already using them, but mainly for the purposes of geometry

[happyhappyland]

ITS IN METHODS STUDY DESIGN. I SUGGEST U PUT THEM IN UR NOTES BOOK.

[AzureBlue]

ITS IN METHODS STUDY DESIGN. I SUGGEST U PUT THEM IN UR NOTES BOOK.

Okay, noted, thanks! - alternatively, just memorise them

[slee]

by compound/double angle formulae you mean  :
sin(A + B) = sinAcosB + cosAsinB ?
thats really part of the study design?
I have never seen it before... :$

[AzureBlue]

Trigonometric Identities

Half-angle formulae


Double Angle formulae


Sum and difference formulae


Product to sum formulae


Sum to product formulae

[andy456]

COMPLETELY OFF TOPIC...did you really get B+ A A for indonesian and only get a 33?

Man thats rough obviously your smart and vcaa only gives ya 33? Lucky for scaling buddy, how the hell did that work out? I though B+ mean around 35? And A's mean ur around 37?

I know. I was pretty upset but the scaling is the best. 33 scales to 41
I think its cause the mean grades for indo are rather high



Thanks everyone.... I'll put them in my reference book