Question

(sin7°+cos15°cos8°)/(sin7°-sin15°sin8°)的化简

这个和（sin7°+cos15°sin8°）/（cos7°-sin15°sin8°）=2-根号3是不同的

Answer 1

原式=(sin(15°-8°)+cos15°sin8°)/(cos(15°-8°)-sin15°sin8°)=(sin15°cos8°+cos15°sin8°-cos15°sin8°)/(sin15°sin8°+cos15°cos8°-sin15°sin8°)=sin15°cos8°/cos15°cos8°=tan15°

Answer 2

(sin(15-8)+cos15sin8)/(sin(15-8)-sin15sin8)=(sin15cos8)/(sin15cos8-cops15sin8-sin15sin8)