f(x)= using newton-raphson method find root,x=1 x=1 tol=0.1

derivative f(x)= I tried to write code in c++

#include #include using namespace std; double f(double x) { return x*tan(x)-1; } double f1(double x) { return ; // I couldnt write derivative of f(x) function could you fix it please? }

int main () { double x=1*M_PI/180.0; double err; double tol=0.01; while (1) { err=f(x)/f1(x); x=x-err; cout * tant - 1 tanx +(1+tan-I) *I