Question 380240
{{{graph(300,300,-2,2,-2,2,0,cos(x/7),7x)}}}
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I used Newton's method with,
{{{f=cos(x/7)-7x}}}
{{{df/dx=-(1/7)sin(x/7)-7}}}
{{{x[1]=0}}}
to obtain an answer of {{{highlight(x=0.142827)}}}