What were some of the muslim contributions in medicine, mathematics, and astronomy?

Muslim contributions in medicine. They discovered that having a sick person exposed to clean air will result to faster recovery.

Muslim contributions in mathematics. They contributed algebra from the written work of Abu Jaffar Muhammad ibn Musa al-Khowrzimi entitled Compendius Book on calculation by completion and balancing. He also wrote about arithmetic and algorithm.

Muslim contributions in astronomy. They created charted charts, optics, and tele-microscope. This is to help them predict the phases of the moon in order to plan for their religious festivals. They also needed to pray in the direction of Mecca