The range of \[f(x)=\cos x-\sin x\] is [MP PET 1995; Pb. CET 2001]

\[\left[ -\frac{\pi }{2},\ \frac{\pi }{2} \right]\]

The range of \[f(x)=\cos x-\sin x\] is [MP PET 19

1.	The range of \[f(x)=\cos x-\sin x\] is [MP PET 1995; Pb. CET 2001]
A.	\[(-1,\ 1)\]
B.	\[[-1,\,\ 1)\]
C.	\[\left[ -\frac{\pi }{2},\ \frac{\pi }{2} \right]\]
D.	\[[-\sqrt{2},\ \sqrt{2}]\]
Answer» E.

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The range of \[f(x)=\cos x-\sin x\] is [MP PET 1995; Pb. CET 2001]

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