A) \[2\]
B) \[3\]
C) \[4\]
D) \[5\]
Correct Answer: B
Solution :
[b] \[f(x)={{\cot }^{-1}}x+\frac{1}{2}{{\cos }^{-1}}x\] Domain: \[[-1,\,1]\] \[f(x)\] is a decreasing function in \[[-1,\,1],\] Hence, range is \[[f(1),\,f(-1)]\]or \[\left[ \frac{\pi }{4},\frac{5\pi }{4} \right].\]You need to login to perform this action.
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