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#### Petrus

##### Well-known member

- Feb 21, 2013

- 739

I am working with finding max and min value and I always hesitate when I got absolute value so the one I strugle is to derivate \(\displaystyle |\sin(x+y)|\)

if we do it respect to x is this correct?

\(\displaystyle f_x(x,y)=\frac{\sin(2x)}{2\sqrt{\sin^2(x+y)}}\)

Best regards,

\(\displaystyle |\pi\rangle\)