QuestionFind the derivative of $y=\sin 3x - \cos 3x$ at $x=45^{\circ}$.

Studdy Solution
Calculate the final value of the derivative at $x=45^{\circ}$.
$$\left. \frac{d y}{d x} \right|_{45^{\circ}} =3 \times0 =0$$So, the derivative of the function $y=\sin3x - \cos3x$ at $x=45^{\circ}$ is0.