Mr.Soh, Mr.Cah, and Mr.Toa are trying to measure the height of a bridge. They are arguing on which trigonometric ratio they should use.

We should use sine

We should use Cosine

We should use tangent

Mr.Soh

Mr.Cah

Mr.Toa

90 °

100ft

?

57 ° 

Hmmmm

Tangent is the right choice because the values that we know are the side that is adjacent and the side that is opposite to the theta

I see now

As you can see we have our angle and our side measurements with x being unknown. Since we know that we are using tangent we need to start off by finding the tangent of 57 which is 1.54.

Now we have to find our ratio. We know that we have our ? (x) and the length of the adjacent side (100). Meaning that our ratio would be x/100 and 1.54/1.