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C2 help thefatone thread

https://a44694f152ee562e38a9454969d2b9a549a03543.googledrive.com/host/0B1ZiqBksUHNYOTR1Zk42aXdIazg/11%20Gold%203%20-%20C2%20Edexcel.pdf

How do i know that π6=30∘\dfrac{\pi}{6} = 30^\circ???
(edited 7 years ago)
Reply 1
Avatar for nerak99
nerak99
13
You are told that R lies on the positive y axis and so why would 2 not be right?

Edit, it is right.
(edited 7 years ago)
Reply 2
Avatar for thefatone
thefatone
OP
6
Original post by nerak99
You are told that R lies on the positive y axis and so why would 2 not be right?

Edit, it is right.


i see thanks :biggrin:
Reply 3
Avatar for thefatone
thefatone
OP
6
:angelwings::bump:
Reply 4
Avatar for Zacken
Zacken
22
Original post by thefatone
:angelwings::bump:


If you have a question, make a new post, don't edit the OP... c'mon.

Anyways, you should know that π↦180∘⇒π6↦1806∘\pi \mapsto 180^{\circ} \Rightarrow \frac{\pi}{6} \mapsto \frac{180}{6}^{\circ}
Reply 5
Avatar for thefatone
thefatone
OP
6
Original post by Zacken
If you have a question, make a new post, don't edit the OP... c'mon.

Anyways, you should know that π↦180∘⇒π6↦1806∘\pi \mapsto 180^{\circ} \Rightarrow \frac{\pi}{6} \mapsto \frac{180}{6}^{\circ}


oops, so to convert from degrees to radians it's divide by 180 then multiply by pi?

oky i though it's be easier for ppl to see
Reply 6
Avatar for Zacken
Zacken
22
Original post by thefatone
oops, so to convert from degrees to radians it's divide by 180 then multiply by pi?


Yep.

oky i though it's be easier for ppl to see


It's not, don't do it.
Reply 7
Avatar for thefatone
thefatone
OP
6
Original post by Zacken
.

question 9 how do i know where the curve intercepts the y-axis?
Reply 8
Avatar for Zacken
Zacken
22
Original post by thefatone
question 9 how do i know where the curve intercepts the y-axis?


The y-axis is when x=0. sin⁡(0+π/6)=sin⁡(π/6)=12\sin (0 + \pi/6) = \sin(\pi/6) = \frac{1}{2}
Reply 9
Avatar for thefatone
thefatone
OP
6
Original post by Zacken
The y-axis is when x=0. sin⁡(0+π/6)=sin⁡(π/6)=12\sin (0 + \pi/6) = \sin(\pi/6) = \frac{1}{2}


derp, i'm so silly -.-
thanks a lot for that :biggrin:

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