Question

I need answer correct ASAP Please!!!

Answer 1

Option 1

Explanation:

Cos B =
`(adjacent)/(hypotenuse)`

Where adjacent = 6, Hypotenuse = 3√5

Cos B =
`(6)/(3√(5) )`

Cos B =
`(2)/(√(5) )`

Cos B =
`(2√(5) )/(5)`

Answer 2

cos(m∠B) = 2√5/5

Explanation:

Easiest way is to guess and check on this problem. When you take the cos(m∠B), you would get 6/3√5, rationalized to 2√5/5. That would be the correct answer.