Question

The picture shows the design of part of a bridge.



What is the height AC of the bridge?

1100over sin30 meters

1100over cos30 meters

1100 sin 30° meters

1100 cos 30° meters

Answer 1

@dan280291

Answer 2

so look at what u've got......the HYPOTENUSE and the angle. Ur after the line OPPOSITE the angle so ur wanting to use sin theta= opp/hyp again.

Answer 3

so 1100 over sin30 meters?

Answer 4

its a bit different this time

sin theta = OPP / HYP

then put in what we know ( we know the length of the hypotenuse and the angle theta)
so..............
sin 30 = OPP / 1100

Now rearrange to get OPP

Answer 5

so cos 30?

Answer 6

close but no cigar

if sin30 = OPP / 1100

then multiply both sides by 1100 to get :

1100 x sin30 = OPP

Answer 7

1100 sin 30° meters?

Answer 8

yep