To solve for H, we use Sin
sin=opp/hyp
Now, we don't have the hypotenuse, so we have to multiply.
So: H= sin18×100
H= 30.9(correct to 1 significant figure)
To check for the correct answer, we take sin inverse on calculator (2nd F, sin), then 30.9
Then press the ab/c button then 100, then press =
You will get 17.99(correct to 1 s.f= 18)
That 18 you got was actually the sin18 or the 18 degrees!!!!!!!!!!
Hope this helps!!!!!
