On Aug. 4, latitude of overhead noon Sun is 17 N. My latitude is 34degrees N. Non sun angle is 73 degrees. How

Question

do I calculate minimum and maximum noon sun angle?

Answer 1

The latitude of the overhead noon sun is known as the sun's declination (Dec). This varies from 23.5 N (summer) to 23.5 S (winter), equivalent to +23.5 to -23.5

The noon sun angle on any date is given by 90 + Dec - Lat, where Lat is your latitude (+34). On August 4th, Dec = +17 so the noon sun angle at 34 N is 90 + 17 - 34 = 73 degrees (as you say).

To find the maximum and minimum noon sun angle, just plug Dec = +23.5 and -23.5 in turn, into the equation.