Question

Evaluate sin(Arcos(-9/√145))

Answer 1

Answer:
`(8)/(√(145))`

We have the following expression:

`sin(arcos(-(9)/(√(145))))`

First we have to solve the inner parenthesis:

`sin(arcos(-0.747))`

Then the second parenthesis:

`sin(138.366)=0.664`

According to the options given, the only expression that fulfills the value of
`0.664` is:

`(8)/(√(145))=0.664`