sin(-60°)+cos225°+tan135°
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sin(-60°)+cos225°+tan135°sin(-60°)+cos225°+tan135°sin(-60°)+cos225°+tan135°原式=-sin60°+cos(180°+45°)+
sin(-60°)+cos225°+tan135°
sin(-60°)+cos225°+tan135°
sin(-60°)+cos225°+tan135°
原式=-sin60°+cos(180°+45°)+tan(180°-45°)
=-sin60°-cos45°-tan45°
=-(√3)/2-(√2)/2-1
=-(2+√3+√2)/2
sin(-60°)+cos225°+tan135°
sin(-60°)+cos225°+tan135°
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