What is the ZENITH angle for a person standing at 30.5 degrees south latitude December 22nd?

On December 22nd, which is the winter solstice in the Southern Hemisphere, the sun is directly overhead at the Tropic of Capricorn, located at 23.5 degrees south latitude. For a person standing at 30.5 degrees south latitude, the zenith angle can be calculated by subtracting their latitude from the sun's declination. The sun's declination on this date is -23.5 degrees, so the zenith angle would be 30.5 degrees - (-23.5 degrees), resulting in a zenith angle of 30.5 + 23.5 = 54 degrees.