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答案:
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1.rz x sn"rrAdr=-( cos x
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2.正割sec(x)与余弦cos(x)互为倒数( )
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3.03.设f(x)在[0,π]上连续,且在x=0处可导,证明tim '/(, cos x cos x co nar jdr-(o)
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4.(2)y' cos x=esim t
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5.函数A、y = u n , u =cos x nB、y = t , t =cos n xC、y = t n , t =cos xD、y =cos t , t = x n
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6.函数y=cos(3-x)(e^x)的微分为
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7.已知cos x=-2a+3,则a的取值范围是
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8.x x x x x x x x x x xxx x x x x x x x x x x x xxx x x()
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9.设 $f(x)$可导,求函数 $y=f(sin ^2 x) + f(cos^2 x) $的导数 $\frac{dy}{dx} $
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10.11.求向量场A=x2 cOos(x)) cOs(x)k在点(-,1,1)处的散度