f(x) = log(sin(x)) ====> df(x)/dx
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f(x) = log(sin(x)) ====> df(x)/dx
急,求马上能回答.
急,求马上能回答.
![f(x) = log(sin(x)) ====> df(x)/dx](/uploads/image/z/8217537-33-7.jpg?t=f%28x%29+%3D+log%28sin%28x%29%29+%3D%3D%3D%3D%3E+df%28x%29%2Fdx)
对数的底数是多少?
假设是e
df(x)=dln(sinx)=(1/sinx)dsinx=(cosx/sinx)dx
所以df(x)/dx=cotx
假设是e
df(x)=dln(sinx)=(1/sinx)dsinx=(cosx/sinx)dx
所以df(x)/dx=cotx