Question

Calculate the value of angle B

Answer 1

Answer: 66.4

Explanation:

The trig ratio you would use is inverse cosine or
`cos^(-1)`.

Cos is adjacent/hypotenuse

So, the ratio you would use is
`cos^(-1)`
`(2)/(5)`.

Insert this in a calculator which come out to be 66.421821522.

But you have to round, so you answer is 66.4.