Answer to Question #8530 in Trigonometry for bre

Question

a staircase has three main parts; the stringer, the riser, and the tread. a carpenter must obey local building codes when she constructs a staircase. the code of one community requires that the sum of the rider and tread must not exceed 449mm. calculate the angle of the staircase whose riser is 175mm. assume the ,easures are at the maximum allowed by the code