sin(∏/4-3x)cos(∏/3-3x)-cos(∏/6+3x)sin((∏/4+3x)
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/28 14:51:50
x)+xѯok\_806RQ$铫UΆ"{mAb Z@VL4c)@M%8&V|gk?ݳigS7<ٱIO'<ݾi뚧{!Wn$@1C{:!B
0Qu̪6ԅ:(oT$a4bi=3U@CFPqSDA07/.H̳
sin(∏/4-3x)cos(∏/3-3x)-cos(∏/6+3x)sin((∏/4+3x)
sin(∏/4-3x)cos(∏/3-3x)-cos(∏/6+3x)sin((∏/4+3x)
sin(∏/4-3x)cos(∏/3-3x)-cos(∏/6+3x)sin((∏/4+3x)
=sin(π/4-3x)*cos(π/3-3x)-sin[π/2-(π/6+3x)]*cos[π/2-(π/4+3x)]
=sin(π/4-3x)*cos(π/3-3x)-sin(π/3-3x)*cos(π/4-3x)
由正弦函数两角和差公式得
=sin[(π/4-3x)-(π/3-3x)]
=sin(-π/12)
= -sin(π/12)
= -√{[1-cos(π/6)]/2}
= -√[(1-√3/2)/2]
= -√{(1/2-√3/2)^2] /2}
= (1/2-√3/2)/√2
= √2/4 - √6/4
sin(∏/4-3x)cos(∏/3-3x)-cos(∏/6+3x)sin((∏/4+3x)
化简[1-(sin^4x-sin^2cos^2x+cos^4x)/(sin^2)]+3sin^2x
证明sin^2(x)+cos^2(x+30)+sin(x)cos(x+30)=3/4
为什么4*sin(2x+∏/3)*cos(2x+∏/3)=2sin(4x+2∏/3)
化简下面的三角函数f(x)=sin^2x+2√3sin(x+∏/4)cos(x-∏/4)-cos^2-√3
2(sin^6x+cos^6)-3(sin^4x+cos^4x)
(1-(sin^4x-sin^2xcos^2x+cos^4x)/sin^2x +3sin^2x
化简[1-(sin^4 x-sin^2 xcos^2 x+cos^4 x)]/(sin^2 x)+3sin^2 x
化简sin(x)(cos(x)+cos(3x)+cos(5x)+cos(7x))
已知sin(x)+3cos(x)=2,求sin(x)-cos(x)/sin(x)+cos(x)=?
sin[cos^2(x^3+x)],求导
根号3sin x+cos x要化简
关于sin^2x+cos^2x 的应用式子:cos^6x+sin^6x=(cos^2x+sin^2x)(cos^4x-cos^2xsin^x+sin^4x)=(cos^2x+sin^2x)^2-3sin^2xcos^2x 求这两步算法中的具体思路 ps:cos^2x=cosx的二次方
求证(3-sin^4 x-cos^4 x)/2cos^2 x=1+tan^2 x+sin^2 x
化简sin^4x+cos^4x-3/4
化简:sin^4 x+cos^4 x-3/4
求4sin(3x)cos(x)的导数式如题
∫cos^4x/sin^3x dx=?