1.

If y = (x^4 - x^2 + 1)/(x^2 + sqrt(3)x + 1) and (dy)/(dx) = ax + b , then the value of a - b is

Answer»

`"cot" pi/8`
`"cot" (5PI)/12`
`"TAN" (5pi)/12`
`"tan"(5pi)/(8`

ANSWER :B


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