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enosthapa
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Homework Statement
Differentiate y=e-xsin(3x)
2.The attempt at a solution
With Product rule
y'=-e-xSin(3x)+3e-xCos(3x)
And Logarithm way
Taking log both sides
lny= lne-x+ln(Sin3x)
lny= 1/x+ln(Sin3x)
1/y*dy/dx=-x-2+3(Cos3x/Sin3x)
y'=-(e-xSin3x)/x2+3e-xCos3x