Question

Find the length of side BA. Round to the nearest hundredth.

A) .42


B) .65


C) .83


D) 1.25

Answer 1

Option A.
`0.42`

Explanation:

we know that

Applying the law of cosines

`BA^(2)=(1/2)^(2)+(1/3)^(2) -2(1/2)(1/3))cos(100)`

`BA^(2)=0.1756`

`BA=0.42`