A third staircase in a swimming pool has a landing of 18 inches and a vertical rise of 12 inches per step. To the nearest degree, calculate the following measures.
a) What is the angle of elevation rounded to the nearest whole degree?
b) If the elevation of each step were changed to 23 inches and the landing became 19 inches,
what is the new angle of elevation for the staircase to the nearest whole degree
well, tanθ = 12/18
now adjust for the new values.