The whole question is: The angle of depression from point R to S is angle- 3 The angle of elevation from point S to R is- 4 Angle 2 is the angle of elevation from- point R to point Q Angle 1 is the angle of- depression from point Q to point R
You multiply 42.75 x 4 and get 171. Then you add 171+52.45=223.45 and then you subtract 223.45-18=205.45 and then you multiply 223.45 x .3333 = 68.3265 or 68.33 (rounded)