Question

Fill in the blank Cos _____ equals √3/2

A. 75
B. 30
C. 45
D. 60

Answer 1

find inverse cos (sqrt(3)/2)

Answer 2

How do I do that?

Answer 3

ok, one moment. I'm close.

Answer 4

ok, imagine you have a 30 60 90 triangle


cos(30) = sqrt(3)/2
inverse cos (30) = 1/cos(30)
1/cos(30) = 1/(sqrt(3)/2))
1/cos(30) = 2/(sqrt(3))