A) \[{{45}^{o}}\]
B) \[{{90}^{o}}\]
C) \[{{15}^{o}}\]
D) \[{{30}^{o}}\]
Correct Answer: D
Solution :
\[{{\sin }^{-1}}\left[ \frac{\sqrt{3}}{2} \right]-{{\sin }^{-1}}\left[ \frac{1}{2} \right]={{60}^{o}}-{{30}^{o}}={{30}^{o}}\].
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