Answer:
The approximate value of arc cos(0.87) is 29.54°
Step-by-step explanation:
we know that
The arc cosine of x is defined as the inverse cosine function of x
so
if y=cos(x)
then
arc cos (y)=x
In this problem we have
y=0.67
so
x=arc cos(0.87)
using a calculator
x=29.54°
