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|dw:1369436912384:dw|

is it like that or is it sin^2A

its sin2A
2sinAcosA

ok

from x= 3sin(a), what would sin(a) be?

x/3?

.. right... ... is x= 3sin(a), what you have or x = 3cos(a)?

the question is x = 3sinA

ok

write the equation simply without A

So y in terms of x and not A right?

yes

|dw:1369437576413:dw|

is that readable

|dw:1369437887196:dw|

lol

well he shudnt get the asnwer too easily so its all good :)

^ true

right :)

|dw:1369437893899:dw|
i dont it get when u went into that part

|dw:1369437924563:dw|

|dw:1369437958849:dw|

not sure you can get rid of the "x" though, I got the same :S

u dont need to they just want an equation without A

right, so I notice

http://www.wolframalpha.com/input/?i=%28y%2F%284x%29%29%5E2%2B%28x%2F3%29%5E2%3D1

was hard to read dan's writting :P

if u wanna see a nice graph :)

can i pls get help on 1 more question?
http://openstudy.com/study#/updates/519ff981e4b04449b221f091

last question :)

just post in the channel, so we can all see it and thus help :)

|dw:1369438736058:dw|

2 ways to go from cosa to a/2 or other way, which trig u know

theres also an identity u can use straight from tan to a double angle

|dw:1369439021400:dw|

|dw:1369439046456:dw|

see if that helps

brb