2010°=360°×6-150°，所以sin2010°=sin(-150°)=-sin(180°-150°)=-sin30°=－1/2= -0.5 cos2010°=cos(-150°)=-cos(180°-150°)=-cos30°=－√3/2= -0.866 cos(sin2010°)=cos(-0.5)=cos0.5 0
