In order to comply with what directions? You've left that out!
The directions for assembling the pool state that the ladder should be placed at an angle of 75 degree relative to level ground. Which of the following expressions involving tangent gives the distance, in feet, that the bottom of the ladder should be placed away from the bottom edge of the pool in order to comply with the directions?
75 is in terms of degrees
(a) , (b) , (c) , (d) , (e)
Also, this is clearly not a Calculus question. Please place your threads in the proper forum.