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September 18, 2014

September 18, 2014

Posted by **lisa** on Friday, November 8, 2013 at 8:16pm.

- ALGEBRA 2 help please would appreciate -
**bobpursley**, Friday, November 8, 2013 at 9:17pmI guess that is 2100 degrees. Well, you know

cos or sin of Theta= cos or sin (theta-n*360)

so what is n?

2100/360= 5 and remainder 120 deg

sin2100= sin120 deg

but sin120=sin(180-120)=sin60

cos2100=cos120=-cos(180-120)=-cos60=-sin30

check this.

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