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Math

posted by on .

hello i need help for derivative: ( sin x ) / ( cos x )
thanks for your help

  • Math - ,

    Hints:
    Use the quotient rule:
    d(u/v)=(vdu-udv)/v^2
    set
    u=sin(x) du/dx=cos(x)
    v=cos(x) dv/dx=-sin(x)
    and
    finally use the identity
    sec(x)=1/cos(x)

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