MCQ
If $U =\{1,2,3,4,5,6\}$ and $A =\{1,2,3,4,5,6\}$, then $A ^{\prime}$ is equal to :
- A$\{0\}$
- B$\{1,2,3\}$
- ✓$\phi$
- D$\{4,5,6\}$
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If
$\sin\theta+\text{cosec}\theta=2,$ then $\sin^2\theta+\text{cosec}^2\theta$ is equal to: