Question

Use trigonometry to find the unknown side (round to 1 decimal)​

Answer 1

a = 7.5

Explanation:

Using the sine ratio in the right triangle and the exact value

sin30° =
`(1)/(2)` , then

sin30° =
`(opposite)/(hypotenuse)` =
`(a)/(15)` =
`(1)/(2)` ( cross- multiply )

2a = 15 ( divide both sides by 2 )

a = 7.5