Find all solutions to the equation.

$\sqrt2\cos\theta+4=5$

• A. $\theta=\frac{\pi}{4}+2\pi n,\frac{3\pi}{4}+2\pi n$
• B. $\theta=\frac{\pi}{4}+2\pi n,\frac{7\pi}{4}+2\pi n$
• C. $\theta=\frac{3\pi}{4}+2\pi n,\frac{5\pi}{4}+2\pi n$
• D. $\theta=\frac{5\pi}{4}+2\pi n,\frac{7\pi}{4}+2\pi n$