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Which one of the following pair of funct...

Which one of the following pair of functions are NOT identical?

A

`e^((Inx)//2) and sqrtx`

B

`tan^(-1)(tanx)& cot^(-1) (cotx)`

C

`cos^2x + sin^4x and sin^2x + cos^4x`

D

`absx/x`and sgn (x) where sgn(x) stands for signum function.

Text Solution

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The correct Answer is:
C
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