Question

please help me grades are do today

Answer 1

Answer:

28

Step-by-step explanation:

$sin=\frac{opp}{hyp}$

$cos = \frac{adj}{hyp}$

$cos^{-1}\left(\frac{45}{51}\right)$

which is 28.07 degree

$sin\left(28.07\right)=\frac{x}{51}$

x= 23.99

23.99+4=h=28