11. The number of integral values of $k$ for which the equation $7 \cos x + 5 \sin x = 2 k +$ 1 has a solution is
(A) 4
(B) 8
(C) 10
(D) 12
11. The number of integral values of $k$ for which the equation $7 \cos x + 5 \sin x = 2 k +$ 1 has a solution is\\
(A) 4\\
(B) 8\\
(C) 10\\
(D) 12\\