Question

Find the length y of the minute hand in 3 sf
Please help

Answer 1

y ≈ 102 cm

Explanation:

Using the cosine ratio in the right triangle

cos43° =
`(adjacent)/(hypotenuse)` =
`(75)/(y)` ( multiply both sides by y )

y × cos43° = 75 ( divide both sides by cos43° )

y =
`(75)/(cos43)` ≈ 102 cm ( to 3 sf )

Answer 2

135 cm

Explanation:

`\cos(43) = (75)/(y)`

`y = (75)/( \cos(43) )`

`y = 135`