求z=ln(cos(x-2y))的偏导数
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共1个回答
热心网友
az/ax
=1/cos(x-2y) ·(-sin(x-2y))·1
=-tan(x-2y)
az/ay
=
=1/cos(x-2y) ·(-sin(x-2y))·(-2)
=2tan(x-2y)
热心网友
az/ax
=1/cos(x-2y) ·(-sin(x-2y))·1
=-tan(x-2y)
az/ay
=
=1/cos(x-2y) ·(-sin(x-2y))·(-2)
=2tan(x-2y)
