All of the above is the correct answer.
Trigonometry is a branch of mathematics that deals with the study of the properties of a triangle. The sides and angles of a triangle are related to each other through the use of different trigonometric functions.
Further, astronomy is the branch of science that deals with the heavenly or celestial bodies. Apparently, in most cases, if we are to determine the distances between them, we require the use of the trigonometric functions for the proper measurement.
Also, we are able to predict the proper movement of the celestial bodies based on the projected sides of triangles.
The movable type was invented around AD 1040 in China during the Song Dinasty. It was a way of printing in which movable elements were used to reproduce documents, usually on paper. It had a great influence on learning if we consider that paper books could be printed and spread to different places
He is chief executive officer of AMR which became until it merged with with US Airways and became American Airlines. He became chairman of it.