請教幾道數(shù)學(xué)題目,當(dāng)函數(shù)y=2cosx-3sinx取得最大值時(shí),tanx等于?
請教幾道數(shù)學(xué)題目,當(dāng)函數(shù)y=2cosx-3sinx取得最大值時(shí),tanx等于?
數(shù)學(xué)人氣:957 ℃時(shí)間:2019-10-29 18:28:36
優(yōu)質(zhì)解答
根號(hào)13(cosxcosm-sinxsinm)=2cosx-3sinx 根號(hào)13cosm=2 cosm=2/根號(hào)13 tanm=3/2 x=-m tanx=-tanm=-3/2
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