f(x)={[(cos^(2)x-sin^(2)x-1)/(sqrt(x^(2)+1)-1),x!=0],[2k," at "x=0]

If quad f(x)={(cos^(2)x-s in^(2)x-1)/(sqrt(x^(2)+1)-1),quad x!=0k,quad x=0 is continuous at x=0, find k

(xtendsto0)(cos^(2)x-sin^(2)x-1)/(sqrt(x^(2)+1)-1)

if f(x)=(cos^(2)x-sin^(2)x-1)/(sqrt(x^(2)+1)-1),x!=0 and f(x)=k,x=0 is continuous at x=0 then k=

If f(x) is continuous at x=0 , where f(x)={:{((cos^(2)x-sin^(2)x-1)/(sqrt(x^(2)+1)-1)", for " x!=0),(2k", for " x=0):} , then k=

If f9x),={(cos^(2)x-sin^(2)x-1)/(sqrt(x^(2)+1)-1)x,!=0,x=0, is continuous at x=0, find k

If the function f(x) = (cos^(2)x - sin^(2)x-1)/(sqrt(x^(2)+1)-1), x != 0 , is continuous at x = 0, then f(0) is equal to

If the function f(x) = (cos^(2)x - sin^(2)x-1)/(sqrt(x^(2)+1)-1), x != 0 , is continuous at x = 0, then f(0) is equal to

If f(x)={(cos^2x-sin^2x-1)/(sqrt(x^2+1)-1), x!=0,and f(x)=k , x=0" is continuous at "x=0,"find " k

Let f(x)={((cos^(2)x-sin^(2)x-1)/(sqrt(x^(2)+4)-2)"," , x ne 0),(a",", x =0):} , then the value of a in order that f(x) may be continuous at x = 0 is

The value of f(0) so that f(x)=(cos^(2)x-sin^(2)x-1)/(sqrt(x^(2)+1)-1 is continuous at x=0 is