(tan30°+tan45°)/(1-tan30°tan45°)-2sin60°-sin^2 40°-cos^2 40°

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(tan30°+tan45°)/(1-tan30°tan45°)-2sin60°-sin^240°-cos^240°(tan30°+tan45°)/(1-tan30°tan45°)-2sin60°-s

(tan30°+tan45°)/(1-tan30°tan45°)-2sin60°-sin^2 40°-cos^2 40°
(tan30°+tan45°)/(1-tan30°tan45°)-2sin60°-sin^2 40°-cos^2 40°

(tan30°+tan45°)/(1-tan30°tan45°)-2sin60°-sin^2 40°-cos^2 40°
原式=(√3/3+1)/(1-√3/3×1)-2×√3/2-(sin^2 40°+cos^2 40°)
=(3+√3)/(3-√3)-√3-1
=2+√3-√3-1
=1

(tan30°+tan45°)/(1-tan30°tan45°)-2sin60°-sin^2 40°-cos^2 40°
=(tan30°+tan45°)/(1-tan30°tan45°)-2sin60°-(sin^2 40°+cos^2 40°)
=(√3/3+1)/(1-√3/3*1)-√3-1
=2+√3-√3-1
=1