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## Homework Statement

## Homework Equations

## The Attempt at a Solution

**Since P=2L, L=1 ?**

**a_o = 1/2 [ ∫(from -1 to 0) -dx + ∫(from 0 to 1) dx ] = 1/2 [ (0-1) + (1-0) ] = 1/2(0) = 0**

**a_n = - ∫ (from -1 to 0) cosn**

*π*x dx + ∫ (from 0 to 1) cosn*π*x dx = 0**b_n =**

**- ∫**(from -1 to 0) sinn*x dx +***π****∫**(from 0 to 1) sinn*x dx = 2/n***π****π - 2/n****π***(cosn**π**) = 2n**π**/ (1-cosn**π**) = { 4/n**π**n is odd ; 0 is even**The problem is my teacher has this as his answer:**

Am i doing something incorrectly?

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