1.

If n is a positive integer, then (a+ib)^(m//n)+(a-ib)^(m//n)

Answer»

`2(a^n+b^2)^(m//2n)COS[m/nTan^(-1)b/a]`
`2(a^n+b^2)^(m//2n)SIN[m/nTan^(-1)b/a]`
`2(a^n+b^2)^(m//2n)cot[m/nTan^(-1)b/a]`
`2(a^n+b^2)^(m//2n)TAN[m/nTan^(-1)b/a]`

ANSWER :A


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