指出下列函數(shù)的連續(xù)范圍和間斷點(diǎn),并畫(huà)出函數(shù)的圖形: f(x)=
當(dāng)x→0時(shí),證明: tan~1-cosx
當(dāng)x→0時(shí),證明: arcsin~x