Answer: 8.4
Step-by-step explanation:
[tex]Tan=\frac{opposite}{adjacent}[/tex]
[tex]o=Tan*a\\o=tan(45)*4.2\\o=6.8[/tex]
Now use the pythagoream's theorem.
[tex]c^2=a^2+b^2\\c=\sqrt[]{a^2+b^2}\\c=\sqrt[]{(6.8)^2+(4.2)^2}\\ c=\sqrt[]{46.24+17.64}\\c=\sqrt[]{63.88}\\ c=7.99\\c=8[/tex]
