If cos(x + 40)o = 0.0872, what is the value of x?
A
85o
B
75o
C
65o
D
45o
Verified Correct Answer: D.
Step-by-Step Mathematical Solution
cos(x + 40)o = 0.0872
x + 40 = cos-10.0872
x + 40o = 84.99o
x = 84.99o - 40o
x = 44.99
x = 45o
Source: Myschool Past Questions Archive (Record #36772)