(sin22度+cos45度*sin23度)/cos22度-sin45度*sin23度,化简

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(sin22度+cos45度*sin23度)/cos22度-sin45度*sin23度,化简
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(sin22度+cos45度*sin23度)/cos22度-sin45度*sin23度,化简
(sin22度+cos45度*sin23度)/cos22度-sin45度*sin23度,化简

(sin22度+cos45度*sin23度)/cos22度-sin45度*sin23度,化简
sin22°+cos45°sin23°
=sin(45°-23°)+cos45°sin23°
=sin45°cos23°-cos45°sin23°+cos45°sin23°
=sin45°cos23°
cos22°-sin45°sin23°
=cos(45°-23°)-sin45°sin23°
=cos45°cos23°+sin45°sin23°+sin45°sin23°
=cos45°cos23°
∴ 原式=sin45°cos23°/(cos45°cos23°)=tan45°=1