Nilai dari limx→ π2 cosxπ2−x=....\lim\limits_{x\rightarrow\ \frac{\pi}{2}}\ \frac{\cos x}{\frac{\pi}{2}-x}=....x→ 2πlim 2π−xcosx=....
222
−1-1−1
−3-3−3
111
−2-2−2