解一下这个?
2020-01-06
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y = ln(sin(x))
dy = (ln(sinx))'*(sin(x))'dx
= (1/sinx)*cos(x)dx
= (cosx/sinx)dx
= cot(x)dx.
dy = (ln(sinx))'*(sin(x))'dx
= (1/sinx)*cos(x)dx
= (cosx/sinx)dx
= cot(x)dx.
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