The number of distinct real roots of \( \left|\begin{array}{lll}\sin x & \cos x & \cos x \\ \cos x & \sin x …

The number of distinct real roots of \( \left|\begin{array}{lll}\sin x & \cos x & \cos x \\ \cos x & \sin x & \cos x \\ \cos x & \cos x & \sin x\end{array}\right|=0 \) in the interval \( -\frac{\pi}{4} \leq x \leq \frac{\pi}{4} \) is

[JEE Main 2021, 25 Jul (Shift 2)]