Solve, for 0 \leq x \leq 2\pi

2 \cos(x-\frac{\pi}{4})=\sqrt{3}

I get the answers  x=\frac{5\pi}{12}, \frac{19\pi}{12}
But the book says the answers are x=\frac{5\pi}{12}, \frac{\pi}{12}

Help please?

EDIT: Realised my errors!