Mic is Still Kind of Annoying

[atwar664]

Yup there is nothing to write about. I don't even have the time to be writing this right now, but I thought there was something I wanted to say. Instead I will just waste time not studying, but since I am here I have a question: if x=3cos(t), 0

Comments

[julzie]

i hate math
i got a d in statistics at jjc and i applied to lewis and they're taking it and i never have to take math again :)

[atwar664]

I hate you.

[junyr]

I think it would be x=3sin(2t). I think, as I don't remember correctly, that sint(2x) = cos (x) if x< 90 degrees. Or something. I know that for a 30 degree angle, cos(x) = sin (2x).

Double check me though.

[atwar664]

well the answer is sin2t=2x\9*root(9-x^2)

the start is that if cos3t=x then cost=x\3

and then you use your double angle identity sin(2t)=2sin(t)*cos(t)
cos2t=1-sin^2t
to substitute for x.

but your knowledge is still intact otherwise. I am kind of impressed. I forgot what I did on the last test. :)

[littlemissscifi]

Is this for econometrics?

[atwar664]

No that would be fun. This is math. :(