sin(120°)=sin(π-120°)=sin(180°-120°)=sin60°=√3/2sin(135°)=sin(π-135°)=sin(180°-135°)=sin45°=√2/2sin(150°)=sin(π-150°)=sin(180°-150°)=sin30°=1/2扩展资料:两角和差公式诱导公式二倍角公式
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sin(120°)=sin(π-120°)=sin(180°-120°)=sin60°=√3/2sin(135°)=sin(π-135°)=sin(180°-135°)=sin45°=√2/2sin(150°)=sin(π-150°)=sin(180°-150°)=sin30°=1/2扩展资料:两角和差公式诱导公式二倍角公式
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