π/3第三個(gè)應(yīng)該是log1/2tan(70°)＜log1/2(cos(25°))＜log1/2(sin(25°))，你再看看是的，不好意思，筆誤了都說(shuō)了是減函數(shù)了：故：tan(70°)>cos(25°)>sin(25°)y=log1/2(x)是減函數(shù)故：log1/2tan(70°)
比較下列各組數(shù)的大小(1)tan2π/5與tan3π/5（2）tan2與tan9（3）log1/2tan70°與log1/2sin25°
比較下列各組數(shù)的大小(1)tan2π/5與tan3π/5（2）tan2與tan9（3）log1/2tan70°與log1/2sin25°
與（1/2）cos25°
其中l(wèi)og1/2的1/2是底數(shù),cos25°是指數(shù)
與（1/2）cos25°
其中l(wèi)og1/2的1/2是底數(shù),cos25°是指數(shù)
數(shù)學(xué)人氣：295 ℃時(shí)間：2020-06-23 08:09:02
優(yōu)質(zhì)解答
1
π/3第三個(gè)應(yīng)該是log1/2tan(70°)＜log1/2(cos(25°))＜log1/2(sin(25°))，你再看看是的，不好意思，筆誤了都說(shuō)了是減函數(shù)了：故：tan(70°)>cos(25°)>sin(25°)y=log1/2(x)是減函數(shù)故：log1/2tan(70°)
π/3第三個(gè)應(yīng)該是log1/2tan(70°)＜log1/2(cos(25°))＜log1/2(sin(25°))，你再看看是的，不好意思，筆誤了都說(shuō)了是減函數(shù)了：故：tan(70°)>cos(25°)>sin(25°)y=log1/2(x)是減函數(shù)故：log1/2tan(70°)
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