Nilai dari limx→π3cosx−cosπ3tan(x−π3)\lim_{x\to\frac{\pi}{3}}\frac{\cos x-\cos\frac{\pi}{3}}{\tan\left(x-\frac{\pi}{3}\right)}limx→3πtan(x−3π)cosx−cos3π adalah ....
123\frac{1}{2}\sqrt{3}213
−123-\frac{1}{2}\sqrt{3}−213
122\frac{1}{2}\sqrt{2}212
12\frac{1}{2}21
−12-\frac{1}{2}−21