Consider the function g(x)=1-cos(2x)/x^2 if xneq0, g(0)=u. The function g is continuous at 0:

Q9Section I (General (compulsory))9 of 180

Filling a removable discontinuity via a half-angle identity

Consider the function $g(x)=\dfrac{1-\cos(2x)}{x^2}$ if $x\neq0$ , $g(0)=u$ . The function $g$ is continuous at $0$ :

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