Trigonometry - Derivations for Sin3A, Cos3A and Tan3A formulas

This video explains how to derive formulas for
sin3A, cos3A and tan3A..

Ptolemy's sum and difference formulas were mentioned in the video and
used in derivations.

By watching this video you can understand how..

Link for Derivation of Sin2A, Cos2A and Tan2A -

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