Answer:
28
Step-by-step explanation:
[tex]sin=\frac{opp}{hyp}[/tex]
[tex]cos = \frac{adj}{hyp}[/tex]
[tex]cos^{-1}\left(\frac{45}{51}\right)[/tex]
which is 28.07 degree
[tex]sin\left(28.07\right)=\frac{x}{51}[/tex]
x= 23.99
23.99+4=h=28
