Question

Help me please I really need help

Answer 1

BC = 17
`√(2)` ft

Explanation:

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

sin45° =
`(1)/(√(2) )` , then

sin45° =
`(opposite)/(hypotenuse)` =
`(AC)/(BC)` =
`(17)/(BC)` =
`(1)/(√(2) )` ( cross- multiply )

BC = 17
`√(2)` ft

Answer 2

`17√(2)` ft

Explanation:

take angle b as reference angle

using sin rule

sin 45 = opposite / hypotenuse

`(1)/(√(2) )` = 17 / BC

BC =17 /
`(1)/(√(2) )`

BC = 17 *
`√(2)`

BC =
`17√(2)` ft