Answer: x=11.57
Step-by-step explanation:
First you would have to find out whether you are using Sin, Cos or Tan.
In this you have the Hypotenuse (the side opposite the right angle) and the Adjacent (the one that is next to the angle 50°).
So to find which one of Sin, Cos or Tan you are using you would have to use:
SOH (the S is for Sin then the O and the H is Opposite over Hypotenuse)
CAH (the C is for Cos and then the A and the H is for Adjacent over Hypotenuse)
TOA (the T is for Tan then the O and the A is for Opposite over Adjacent)
For this one, because you have the Hypotenuse (18) and Adjacent (x) you would be using Cos.
So to find the length you would have to do:
Cos50°=x/18
Then because you only want x on it's own you do the inverse and instead of dividing x by 18, you times cos50° by 18. This looks like:
18Cos50°=x
You would have to put this in your calculator to get the answer.
So the answer would be x=11.57
Hope this helps :)
