I am given examples of this for Brampton (Canada) (43° 41’ latitude)
On the Summer Solstice you do latitude minus the Earth’s axis tilt which is 23° 26’, so 43° 41’ - 23° 26’ = 20° 15’.
On the Winter Solstice you do latitude plus the Earth's axial tilt, so 43.° 41’ + 23° 26’ = 67° 07’.
I found that the latitude of Kinshasa is approximately 4° 19'S but I'm not sure how we would use this information to solve the question. If we would subtract from the Earth axis tilt we would get a negative value, which doesn't make sense to me. From what I know is that the Summer Solstice occurs when the sun is directly over the Tropic of Cancer, which is located at 23.5° latitude. The Winter Solstice occurs when the sun is directly over the Tropic of Capricorn, which is located at 23.5° south of the equator. Kinshasa is located in the tropic of Capricorn. So can you help me understand how to calculate these?