Evaluate limx→0coshx−1x2\lim_{x \to 0} \frac{\cosh x - 1}{x^2}limx→0x2coshx−1 where coshx=ex+e−x2\cosh x = \frac{e^x + e^{-x}}{2}coshx=2ex+e−x.
000
12\frac{1}{2}21
111
222