Question

Find the length of FV

Answer 1

A

Explanation:

Using the cosine ratio in the right triangle

cos43° =
`(adjacent)/(hypotenuse)` =
`(TV)/(FV)` =
`(53)/(FV)` ( multiply both sides by FV )

FV × cos43° = 53 ( divide both sides by cos43° )

FV =
`(53)/(cos43)` ≈ 72.47 ( to 2 dec. places )

Answer 2

72.47

Explanation:

FV cos 43 = TV

FV (0.73135370161 ) = 53

FV = 72.468 = 72.47