Solution:
Option(B) is correct.
Domain for function 
![[-1,1]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-bd9ec9b7fdf72f6f954becf26cf7129a_l3.png "Rendered by QuickLaTeX.com")
![[0, \pi]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-3ee8a7f2b7324e2152a4807a1b912cfc_l3.png "Rendered by QuickLaTeX.com")
When a function is multiplied by an integer, the domain of the function is decreased by the same number.
Therefore, domain of 
Multiplying the function by 2
![\left[\frac{-1}{2}, \frac{1}{2}\right]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-2b2127e7c856ce7280a6fc7257d27da7_l3.png "Rendered by QuickLaTeX.com")
Mark (√) against the correct answer in the following: Let 
A.
B.
C. ![\left[\frac{-\pi}{2}, \frac{\pi}{2}\right]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-d03f7933dddf8dbceee8c92c85707a25_l3.png "Rendered by QuickLaTeX.com")
D. ![\left[\frac{-\pi}{4}, \frac{\pi}{4}\right]](https://www.learnatnoon.com/s/wp-content/ql-cache/quicklatex.com-36caf65bb0d2f985fd702c950c7c7653_l3.png "Rendered by QuickLaTeX.com")
