If `y=(x^4-x^2+1)/(x^2+sqrt(3)x+1)a n d(dy)/(dx)=a x+b ,` then the value of a-b is (a)`cot(pi/8)` (b) `cot(pi/12)` (c) `tan((5pi)/12)` (d) `tan((5pi)/8)`

If y=(x^4-x^2+1)/(x^2+sqrt(3)x+1) and (dy)/(dx)=a x+b , then the value of a+b is (a) cot(pi/8) (b) cot((5pi)/12) (c) tan((5pi)/12) (d) tan((5pi)/8)

If y=(x^4-x^2+1)/(x^2+sqrt(3)x+1) and (dy)/(dx)=a x+b , then the value of a+b is (a) cot(pi/8) (b) cot((5pi)/12) (c) tan((5pi)/12) (d) tan((5pi)/8)

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 (a)cot((pi)/(8))(b)cot((pi)/(12))(c)tan((5 pi)/(12))(d)tan((5 pi)/(8))

If y=Cot^(-1)[tan((pi)/(2)-x)] then (dy)/(dx) =

The value of tan(pi+x)tan(pi-x)cot^(2)x is

What of the value of tan.(pi)/(8).tan.(pi)/(12).tan.(pi)/(4).tan.(3pi)/(8)tan.(5pi)/(12) ?

If y=tan^(-1)(cot((pi)/(2)-x)) then (dy)/(dx) is equal to

int_(0)^( pi)|sin x|-|cos x||dx is equal to (a) tan((3 pi)/(8))( b) tan((pi)/(8))(c)4tan((pi)/(8))(d)2tan((3 pi)/(8))