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This document provides formulas and identities for trigonometric functions, including expressions for sin(A+B), cos(A+B), tan(A+B) and their counterparts with A-B. It explains how to prove trigonometric identities by manipulating expressions using known identities. An example shows proving the identity cos4x = (8+2cos2x+8cos4x)/12 through a series of steps using double-angle formulas. The document emphasizes practicing these techniques to gain familiarity with trigonometric content and proofs.

Author

Antonio Pérez-Labarta

Language

EN