Question

Вычислить sin300°-cos450°

Answer 1

$sin300-cos450=sin300-cos90=sin \frac{5 \pi }{3}-cos \frac{ \pi }{2}=- \frac{ \sqrt{3} }{2}-0=- \frac{ \sqrt{3} }{2}$

Answer 2

sin300°-cos450°= sin(360°-60°)-cos(360°+90°)=-sin60°-cos90°=-√3/2-0=-√3/2