Forgot password? New user? Sign up

Existing user? Log in

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

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

Problem Loading...

Note Loading...

Set Loading...