Before I can do the error, I have to do use the trapezoidal rule and I think I've started correctly but I'm not sure where I've a mistake that I can't get the correct answer. Do I need to do the antiderivative of cos (4x) first and then plug in the x values?

IP In estimating cos(4x)dax using Trapezoidal and Simpson's rule with n = 6, we can estimate the error - 1 involved in the approximation using the Error Bound formulas. For Trapezoidal rule, the error will be less than For Simpson's rule, the error will be less than syntax incomplete. Give your answers accurate to at least 2 decimal places\f