You can put this solution on YOUR website! show an evaluatuion of sin 120 degrees uaing the trigonometric addidtion formulas
-----
sin(120) = sin(90+30) = sin(90)cos(30) + cos(90)*sin(30)
-------
= 1*cos(30) + 0*(1/2)
-----
= cos(30) = sqrt(30)/2
=============================
Cheers,
Stan H.
(