Question

what reduces friction between parts of a mschine​

Answer 1

Explanation:

Trigonometry (from Greek trigōnon, "triangle" and metron, "measure") is a branch of mathematics that studies relationships between side lengths and angles of triangles. The field emerged in the Hellenistic world during the 3rd century BC from applications of geometry to astronomical studies.

Derivatives of Basic Trigonometric Functions:

\large\fbox{Derivatives :}