1.

If C_(0), C_(1), C_(2), …, C_(n) are binomial coefficients, then sum_(k=0)^(n) C_(k) sin kx cos (n-k) x equals

Answer»

`2^(n) SIN NX`
`2^(n+1) sin (n+1)x`
`2^(n-1) sin nx`
`2^(n+1) sin nx`

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