求limn*sin(180/n)
令x=1/n則n=1/x n→無(wú)窮,x→0
limn*sin(180/n)=limsin（180x)/x
當(dāng)x→0 ,sin180x~180x
limn*sin(180/n)=limsin（180x)/x=180
PI的值是n*sin(180/n)當(dāng)n趨向無(wú)窮時(shí)的極限值
PI的值是n*sin(180/n)當(dāng)n趨向無(wú)窮時(shí)的極限值
數(shù)學(xué)人氣：356 ℃時(shí)間：2020-02-06 03:22:05
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