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**Alice96** The amount of sunlight falling on each unit of area of a horizontal surface(such as a lake)-which is known as "insolation"- depends on the height of the sun in the sky. It is not unreasonable to suppose that, with t measured in hours from sunrise, d denoting the total hours of daylight, and m the elevation of the sun at noon, the insolation function is given by sin(m)sin((pi*t)/d). Find the average amount of insolation over the course of daylight hours.

I don't even know where to start so if you have any ideas please let me know