sin（-1320°）cos1110°+cos（-1020°)sin750°+tan495°
=sin120°cos30°+cos60°sin30°+tan135°
=sin60°cos30°+cos60°sin30°+（-tan45°）
=sin（60°+30°）-tan45°
=sin90°-tan45°
=1-1
=0
sin（-1320°）cos1110°+cos（-1020°)sin750°+tan495°
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