writing sinh inverse (-(48/55)) in logarithim form

writing sinh inverse (-(48/55)) in logarithim form

$$\\\boxed{\sinh^{-1}{(x)}=\ln{(x+ \sqrt{x^2+1} }) }\\ \\
\sinh^{-1}{( -{48 \over 55} )}
= \ln{ \left(-{48 \over 55}
+\sqrt{ (-{48 \over 55} )^2+1}
\right)} \\\\
=\ln{(0.45454545455)}\\\\
=-0.78845736036$$