Q. The degree measure of 1 radian is :
Answer: $latex 57\textdegree16'22''$
Notes: $latex \therefore 1 radian = \frac{180\textdegree}{\pi}&s=1$ $latex = \frac{180\times7\textdegree}{22}&s=1$ $latex = \frac{630}{11} = 57\frac{3}{11}\textdegree&s=1$ $latex = 57\textdegree\frac{3}{11}\times 60' = 57\textdegree\frac{180'}{11}&s=1$ $latex = 57\textdegree16'\frac{4}{11}\times 60'' = 57\textdegree16'22''&s=1$ Hence option [C] is the right answer.

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