Any help would be very much appreciated:3) A third staircase in a swimming pool has a landing of 15 inches and a vertical rise of 12 inches per step. To the nearest degree, calculate the following measures (you must show all work to receive full credit):

a) What is the angle of elevation rounded to the nearest whole degree?

b) If the elevation of each step were changed to 10 inches and the landing became 7 inches,
what is the new angle of elevation for the staircase to the nearest whole degree?

Question

Any help would be very much appreciated:3)  A third staircase in a swimming pool has a landing of 15 inches and a vertical rise of 12 inches per step.  To the nearest degree, calculate the following measures (you must show all work to receive full credit):

a)	What is the angle of elevation rounded to the nearest whole degree? 


	b)  If the elevation of each step were changed to 10 inches and the landing became 7 inches, 
	what is the new angle of elevation for the staircase to the nearest whole degree?

anonymous · Answer

Yes I copied and pasted it but, here is what I know... the angle elevation is 55 not sure how to show it though.

kohai · Answer

|dw:1423870455390:dw|
Let angle of elevation be θ
tan θ = 12/15
θ = tan⁻¹ (12/15)
= ?

kohai · Answer

Ugh let me draw this

kohai · Answer

|dw:1423870568712:dw|
Do you know why I use inverse tan instead of regular tan?