I have a couple questions when it comes to this, but it say to find the

cos ( -270 ).

I think the coordinates are ( 0, 1 ) idk what to do after this.

...Help? Please?

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- Aug 19th 2008, 11:42 AMtopaz192Unit Circles
I have a couple questions when it comes to this, but it say to find the

cos ( -270 ).

I think the coordinates are ( 0, 1 ) idk what to do after this.

...Help? Please? - Aug 19th 2008, 12:16 PMChop Suey
Find a coterminal for -270 between 0 and 360.

$\displaystyle -270 + 360 = 90$

From the unit circle, $\displaystyle \cos{90}$ is 0, because, as you said, the coordinates are (0,1). The points are in this form:

$\displaystyle P(\cos\theta, \sin\theta)$ - Aug 19th 2008, 12:40 PMtopaz192
wouldnt it just be zero then? cuz cos is focused on the x...and its ( 0, 1 )

- Aug 19th 2008, 01:07 PMChop Suey
- Aug 19th 2008, 01:10 PMtopaz192
oh im sorry i read what you wrote wrong. lol sorry!