Finds the root of an equation using a Numerical Technique called Newton-Raphson Method.
a=nrsolve(x0,f,df,tol)
Initial Guess(It should be somewhat near the root, though it is not always necessary)
equation(function) whose root is to be estimated
the derivative of the function f(define a function df which is the derivative of the equation whose root is to be estimated)
Tolerance or acceptable error in the root.
root of the equation in the interval [a,b]
Finds the root of an equation using the Numerical technique of Finding a root called Newton Raphson Method.
NOTE: This method does not find all the roots but only One root near the initial guess.
To find different roots try using different initial guesses.