When θ = 5 pi over 6, what are the reference angle and the sign values for sine, cosine, and tangent?

θ' = negative pi over 6; sine and cosine are positive, tangent is negative.
θ' = 5 pi over 6; sine and tangent are positive, cosine is negative
θ' = pi over 6; sine is positive, cosine and tangent are negative
θ' = negative 5 pi over 6; sine is positive, cosine and tangent are negative

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