Cosine of Integer Multiple of Argument/Formulation 1/Examples

Examples of Use of Cosine of Integer Multiple of Argument/Formulation 1

Cosine of Quintuple Angle

$\cos 5 \theta = \dfrac 1 2 \paren {\paren {2 \cos \theta }^5 - 5 \paren {2 \cos \theta }^3 + 5 \paren {2 \cos \theta } }$

Cosine of Sextuple Angle

$\cos 6 \theta = \dfrac 1 2 \paren {\paren {2 \cos \theta }^6 - 6 \paren {2 \cos \theta }^4 + 9 \paren {2 \cos \theta }^2 - 2 }$