To find all the missing parts of the triangle, we need to know the triangle trigonometry:
We can find the sides first, with the angle A=28 and the hypotenuse=7
[tex]\begin{gathered} \sin (28)=\frac{a}{7} \\ a=7\sin (28) \\ a=3.3\text{ } \end{gathered}[/tex]Now, the side b:
[tex]\begin{gathered} \cos (28)=\frac{b}{7} \\ b=7\cos (28) \\ b=6.2 \end{gathered}[/tex]Having all the sides, we can calculate the angle B:
[tex]\begin{gathered} \sin (B)=\frac{6.2}{7} \\ B=\sin ^{-1}(\frac{6.2}{7}) \\ B=62.3\text{ degr}ees \end{gathered}[/tex]
