来去随风kc 春芽
共回答了12个问题采纳率:100% 举报
1年前
回答问题
化简 sin105°-cos105° (cosπ/12+sinπ/12)(cosπ/12-sinπ/12) 1-2sin
1年前1个回答
cos72(cos72-cos12)+sin72(sin72-sin12)答案是0.
1年前2个回答
(cos12\派-sin12\派)(cos12\派+sin12\派)=?
1年前3个回答
(sin12°+cos30°sin18°)/(cos12°-sin30°sin18°)
cos12°cos98°-sin12°sin98°=
cos12*cos98-sin12*sin98=?
cos57°cos12°+sin57°sin12°=( )
sin33°·cos12°+cos33°·sin12°=?
求值:sin12°cos18°+cos12°sin18°=( )
证明 (sin14°+cos26°sin12°)/(cos14°-sin26°sin12°)=tan26°
(cos丌/12一sin丌/12)(cos丌/12+sin丌/12)=? 如题 求学霸
(sinπ/12+cosπ/12)(sinπ/12-cosπ/12)=
已知√2(sin12°+cos12°),b=(√3 )sin12°+cos12°,c=√(2+2sin12°),则a、b
急求!(数学)(sin12°-sin15°cos3°)/(cos12°-cos15°cos3°)=?过称!
(cosπ/12-sinπ/12)*(COSπ/12+sinπ/12)等于
求值:cos105°cos15°-sin105°sin15°=−12−12.
cos42°cos12°+sin45°sin12°值等于多少
三角代换问题2*sin(∏/12)*(sin(∏/6))怎样化为cos(∏/12)-cos(3*∏/12)?
(cos30度sin18度+sin12度)/(sin30度sin18度-cos12度)
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when one of his w_______student heard that he was going to l
0.9+3.99+6.9+9.99+12.9+15.99+...+48.9+51.99
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At the meeting, we discussed___ we should spend more money on the project.
设y等于lnx加cos三次方x求dy 速度 跪求······
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