A 40 foot long escalator rises from the first floor to the second of a shopping mall. The escalator makes a 30 degree angle with the horizontal. How high above the first floor is the second floor?

Answer 1

sin 30° = height/40
height = 40sin30
= ...

Answer 2

Is it 20 feet

Answer 3

We never learned sin We use a different formula. I am using 30 60 90 triangle formula