\[\large S_n= \cos^2 \dfrac{π}{n} + \cos^2 \dfrac{2π}{n} + \cos^2 \dfrac{3π}{n} + \cdots + \cos^2 \dfrac{(n-1)π}{n}\]

For integer \(n\geq 2\), simplify \(S_n\) to an algebraic function of \(n\).

×

Problem Loading...

Note Loading...

Set Loading...