\(\displaystyle{\cos{{\left(\angle{L}\right)}}}=\frac{{{M}{L}}}{{{K}{L}}}\)

\(\displaystyle{\cos{{x}}}=\frac{{1.1}}{{4.2}}\)

\(\displaystyle{\cos{{x}}}={0.262}\)

\(\displaystyle{x}={{\cos}^{{-{{1}}}}{\left({0.262}\right)}}\)

\(\displaystyle{x}\approx{75}°\)

\(\displaystyle\angle{L}={75}°\)

\(\displaystyle{\cos{{x}}}=\frac{{1.1}}{{4.2}}\)

\(\displaystyle{\cos{{x}}}={0.262}\)

\(\displaystyle{x}={{\cos}^{{-{{1}}}}{\left({0.262}\right)}}\)

\(\displaystyle{x}\approx{75}°\)

\(\displaystyle\angle{L}={75}°\)