1.cos30°-sin45°/sin60°-cos45°
=[(½√3)-(½√2)]/[(½√3)-(½√2)]
=1
2.(sin30^2)30°+2sin60°+tha45°-tan60°+(cos^2)30°
=(½)²+2×(½√3)+1-(√3)+(½√3)²
=(¼)+(√3)+1-(√3)+(¾)
=2
3.√1-2tan60°+(tan^2)60° -tan60°
=[√(1-tan60°)²]-√3
=(√3)-1-√3
=-1
1.cos30°-sin45°/sin60°-cos45°
=[(½√3)-(½√2)]/[(½√3)-(½√2)]
=1
2.(sin30^2)30°+2sin60°+tha45°-tan60°+(cos^2)30°
=(½)²+2×(½√3)+1-(√3)+(½√3)²
=(¼)+(√3)+1-(√3)+(¾)
=2
3.√1-2tan60°+(tan^2)60° -tan60°
=[√(1-tan60°)²]-√3
=(√3)-1-√3
=-1