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Need help with using Newton-Raphson method

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bantamm

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guys

help needed again.
I have to show the root graphically of x^2-4cosx

I have done it in table form and come to answer, but also need to graph it, and Im stuck.
I need values for f(x) and f'(x)

I have been going round in circles trying to get the right values, but the lines do not intersect, thus my values for f(x) and f'(x) must be incorrect for the graph.

HELP PLEASE!!
 

newton-raphson help

I have finally figured it out.

re-arrange the equation to read x^2 = 4cozx
the plot it on the graph.
My mistake was leaving a minus sign in there.
can close this thread.
 

newton-raphson help

Good job !
 

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