Posted by lisa on .
find the exact value for cosine and sine of 2,1oo degree thanks

ALGEBRA 2 help please would appreciate 
bobpursley,
I guess that is 2100 degrees. Well, you know
cos or sin of Theta= cos or sin (thetan*360)
so what is n?
2100/360= 5 and remainder 120 deg
sin2100= sin120 deg
but sin120=sin(180120)=sin60
cos2100=cos120=cos(180120)=cos60=sin30
check this.