{[sin(π-α)-cosα]^2}/{cot[(3π/2)+α]} - 2cos(α+5π/6)*cos(α-5π/6)
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{[sin(π-α)-cosα]^2}/{cot[(3π/2)+α]} - 2cos(α+5π/6)*cos(α-5π/6)
{[sin(π-α)-cosα]^2}/{cot[(3π/2)+α]} - 2cos(α+5π/6)*cos(α-5π/6)
{[sin(π-α)-cosα]^2}/{cot[(3π/2)+α]} - 2cos(α+5π/6)*cos(α-5π/6)
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