Answer:
89.5°
Step-by-step explanation:
Using the vector formula [tex]u.v = |u||v|cos\theta[/tex]
|u| = magnitude of vector u
|v| = magnitude of vector v
u.v is the dot product of vector u and v
Given |u| = 88, |v| = 99 and u.v = 77, to get [tex]\theta[/tex] we will substitute the given values into the equation above;
[tex]77 = 88*99cos\theta\\cos\theta = \frac{77}{88*99} \\cos\theta = \frac{77}{8712} \\cos\theta = 0.008838\\\theta = cos^{-1} 0.008838\\\theta = 89.5^{0}[/tex]
