Original Function: -cos(3x)
Derivative Function: 3 sin(3x)
The period for the function and its derivative is 2π/3 radians. Over one period, when is the derivative function equal to its original function? That is, when is f(x) = f '(x) over 0≤x≤2π/3? Round your final answer to three decimal places.
Please help me with step by step solution algebraically