Question

How long is BC? answer exactly, using radical if needed.​

Answer 1

Answer:

2 units

Step-by-step explanation:

Sin(30) = BC/4

BC = 4×½ = 2

Answer 2

hello mate

This is neha to help you here

answer

since its a right traingle we can use trignometric ratos to solve this problem

<A= 30°

AB=4CM

AB IS THE HYPTONUESE OF THE TRAINGLE = 4CM

AND BC IS THE OPPOSITE SIDE OF ANGLE 30°

SO,

SIN30° =$\frac{OPPOSITE SIDE}{HYPOTENUSE}$

$\frac{1}{2} = \frac{x}{4} \\\\CROSS MULTIPLYING\\\\2X= 4\\\\X= \frac{4}{2}\\ \\X= 2CM$

SO BC IS 2 CM LONGER