MCQ
જો $D=\begin{vmatrix}{1}&{3\cos\theta}&1\\\sin\theta&1&3\cos\theta\\1&\sin\theta&1\\\end{vmatrix}$ તો $D$ નું મહતમ મૂલ્ય $.........$ છે.
- ✓$10$
- B$4$
- C$6$
- D$2$
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