MCQ
Solution of $\int \sin 3 x\ d x$ is
- A$\frac{1}{3} \cos 3 x+c$
- B$\frac{1}{3} \sin 3 x+c$
- C$-\frac{1}{3} \sin 3 x+c$
- ✓$-\cos 3 x+c$
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If $\overrightarrow{ c } \cdot(\hat{ i }+\hat{ j }+3 \hat{ k })=8$ then the value of $\overrightarrow{ c } \cdot(\overrightarrow{ a } \times \overrightarrow{ b })$ is equal to ...... .