(cosx/12+sinx/12)(cosx/12-sinx/12)=?
来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/14 11:31:15
(cosx/12+sinx/12)(cosx/12-sinx/12)=?(cosx/12+sinx/12)(cosx/12-sinx/12)=?(cosx/12+sinx/12)(cosx/12-si
(cosx/12+sinx/12)(cosx/12-sinx/12)=?
(cosx/12+sinx/12)(cosx/12-sinx/12)=?
(cosx/12+sinx/12)(cosx/12-sinx/12)=?
x是π吧
原式=cos²π/12-sin²π/12
=cos2*π/12
=cosπ/6
=√3/2
(cosx/12+sinx/12)(cosx/12-sinx/12)
=(cosx/12)(cosx/12)-(sinx/12)(sinx/12)
=cosx/6
cos2X/144吧
(cosx/12+sinx/12)(cosx/12-sinx/12)=?
sin2x-12(sinx-cosx)+12=0解方程
已知sinx*cosx=12/25,且5π/4
sinx*(-5/13)+cosx*12/13=3/50
积分[cosx/(sin^2x-6sinx+12)]dx
sinx-cosx
cosx-sinx
化解cosx(sinx+cosx)-sinx(cosx-sinx)/(sinx+cosx)².
sinx+cosx
sinx>cosx
求函数y=(sinx-cosx)/(sinx+cosx),x∈【-π/12,π/12】的最值
求积分1.∫[(sinx-cosx)/(sinx+cosx)] dx 2.∫dx/(x²-7x+12)
sinX-cosX/cosX-tanX
已知sinx=12/13 x是第二象限角 求1+sin2x/cosx+sinx
【高一数学】三角函数一般难度求值题》》》已知5sinx+12cosx=0求(sinx+9cosx)/(2-3sinx)写出全过程和答案,谢谢!
化简(sinx+cosx)*(sinx+cosx)+sinx-cosx*cosx
已知sinx+cosx=1/5,x属于(0,π),求tanx的值sinx+cosx=1/5(sinx)^2+(cosx)^2=1(sinx+cosx)^2=(sinx)^2+(cosx)^2+2sinxcosx=1/252sinxcosx=-24/25sinxcosx=-12/25 到这部我不会了,
已知sinX-cosX=1/5且0提示:sinX-cosX=1/5(sinX-cosX)^2=1/25-2sinXcosX=1/25-1=-24/252sinXcosX=24/25sinXcosX=12/25