Question

A4 Find length AC
idk how to do this someone help me

Answer 1

AC ≈ 16.8 cm ( to 1 dec. place )

Explanation:

Using the sine ratio in the right triangle

sin71° =
`(opposite)/(hypotenuse)` =
`(AB)/(AC)` =
`(15.9)/(AC)`

Multiply both sides by AC

AC × sin71° = 15.9 ( divide both sides by sin71° )

AC =
`(15.9)/(sin71)` ≈ 16.8 cm

Answer 2

16.8 cm

Explanation:

Sin (theta)=opposite/HYPOTENUSE

Where theta=71 and opposite=15.9

Putting in the above formula

Sin 71=15.9/AC

AC=15.9/sin71

AC=15.9/0.945

AC=16.8 cm