Nilai dari sin120°+cos60°sin30°−cos210°=....\frac{\sin120\degree+\cos60\degree}{\sin30\degree-\cos210\degree}=....sin30°−cos210°sin120°+cos60°=....
−12-\frac{1}{2}−21
−3-\sqrt{3}−3
3\sqrt{3}3
111
123\frac{1}{2}\sqrt{3}213