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Home  >>  CBSE XI  >>  Math  >>  Trigonometric Functions
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Find the radian measures corresponding to the following degree measures :-$25^{\large\circ}$

$\begin{array}{1 1}(A)\;4\pi&(B)\;\large\frac{5\pi}{36}\\(C)\;\large\frac{8\pi}{36}&(D)\;\large\frac{4\pi}{36}\end{array} $

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1 Answer

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Toolbox:
  • $\pi$ radians=$180^{\large\circ}$
  • $1^{\large\circ}=(\large\frac{\pi}{180})$ radian=0.01746(approx)
We have $180^{\large\circ}=\pi$radians
$25^{\large\circ}=\large\frac{\pi}{180}$$\times 25$ radians
$\Rightarrow 25^{\large\circ}=\large\frac{5\pi}{36}$ radians
Hence (B) is the correct answer.
answered Apr 16, 2014 by sreemathi.v
 

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