It is not for programming, so do not use software or programming language. Using bracketing or open method. The temperature inside a material, which has a heat source on

its

surface, is obtained by solving the following equation:

$e^{-(\frac{1}{2})t}cos{h}^{-1}(e^{(\frac{1}{2})t})=\sqrt[\phantom{2}]{\frac{k}{2}}$

Find the temperature $t$ for $k=0\mathrm{.}3a$