Write the range of the function f(x)= [x], where - 2 <x< 2 - Vidyadip

Question

Write the range of the function $\text{f(x)}=\cos[\text{x}],$ where $\frac{-\pi}{2}<\text{x}<\frac{\pi}{2}$

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Answer

We have,$\text{f}(\text{x})=\cos[\text{x}], \text{where}\frac{-\pi}{2}<\text{x}<\frac{\pi}{2}$
clearly,Range $(\cos[\text{x}])= \{1,\cos1,\cos2\}$

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