What is 3cos(2pi+(2pi)/3)n ?

The solution to 3cos(2pi+(2pi)/3)n is -(3n)/2

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simplify 3cos(2pi+(2pi)/3)n

simplify

3 cos (2 π + \frac{2 π}{3}) n

- \frac{3 n}{2}

Solution steps

3 cos (2 π + \frac{2 π}{3}) n

Rewrite using trig identities

= 3 (- \frac{1}{2}) n

Simplify

3 (- \frac{1}{2}) n : - \frac{3 n}{2}

= - \frac{3 n}{2}

cot (arccos (\frac{c}{x}))

cos (2 x - 2 π)

csc (x) tan^{2} (- x)

7 sin ((n + 2) π) - 7 sin (nπ)

sin (\frac{π}{3} - x)