Question

The answer to this problem

Answer 1

B.
`(7√(2))/(34)`

Explanation:

Cos θ = Adjacent/hypotenuse

Adjacent = 7

Hypotenuse = √(23² + 7²) = √578 = 17√2

Thus:

Cos θ =
`(7)/(17√(2))`

Rationalize

Cos θ =
`(7*√(2))/(17√(2)*√(2))`

Cos θ =
`(7√(2))/(17*2)`

Cos θ =
`(7√(2))/(34)`