\(\left|\begin{array}{ccc} \cos (A+B) & -\sin (A+B) & \cos (2 B) \\ \sin A & \cos A & \sin B \\ -\cos A & \sin A & \cos B \end{array}\right|\) = 0 అయితే, B విలువ
1
nπ, n ∈ ℤ
2
\((2 \mathrm{n}+1) \frac{\pi}{2}, \mathrm{n} \in \mathbb{Z}\)
3
\((2 n+1) \frac{\pi}{4}, n \in \mathbb{Z}\)
4
\(2 \mathrm{n} \frac{\pi}{3}, \mathrm{n} \in \mathbb{Z}\)