Answer:
The approximate value is [tex]56.63^o[/tex]
Step-by-step explanation:
Let
[tex]\theta[/tex] ----> the measure of angle in degrees
we have that
[tex]cos(\theta)=0.55[/tex]
Using a calculator
Find the measure of angle [tex]\theta[/tex]
[tex]\theta=cos^{-1}(0.55)[/tex]
[tex]\theta=56.63^o[/tex]
