化简:sin(x-2派)cos(x+派)tan(x-99派)/cos(派-x)sin(3派-x)sin(-x-派)
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/08/28 21:08:54
化简:sin(x-2派)cos(x+派)tan(x-99派)/cos(派-x)sin(3派-x)sin(-x-派)
sin(x-2π)cos(x+π)tan(x-99π)/cos(π-x)sin(3π-x)sin(-x-π)
=sin(-2π+x)cos(π+x)tan(-99π+x)/(-cosx)sin(π-x)[-sin(x+π)]
=sinx(-cosx)tan(-π+x)/(-cosx)sinx[-sin(π+x)]
=sinx(-cosx)[-tan(π-x)]/(-cosx)sinx[sinx]
=sinx(-cosx)[tanx]/(-cosx)sinxsinx
=tanx/sinx=1/cosx=secx.
=sin(-2π+x)cos(π+x)tan(-99π+x)/(-cosx)sin(π-x)[-sin(x+π)]
=sinx(-cosx)tan(-π+x)/(-cosx)sinx[-sin(π+x)]
=sinx(-cosx)[-tan(π-x)]/(-cosx)sinx[sinx]
=sinx(-cosx)[tanx]/(-cosx)sinxsinx
=tanx/sinx=1/cosx=secx.
化简sin(派-x)+sin(派+x)-cos(-x)+cos(2派-x)-tan(派+x)cot(派-x)
化简:sin(2派-x)tan(派+x)cot(-x-派)/tan(3派-x)cos(派-x)
f(x)=sin(派-x)cos(2派-x)/sin(派/2+x)tan(派+a) 求f(31派/3)
已知sinx=3/5,求sin(x-3/2派cos(派-x)tan(派+x)
sin(x+派/3)+2sin(x-派/3)-根号3cos(2派/3-x)
sin,cos,tan(x-派)分别等于什么
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cos(2x+派/2)=sin(2x)?
已知COS(X+派/4)=根号2/10,x属于(派/2,3派/4) 求sinx 求sin(2x+派\4)
.若f(x)={sin(n派-x)cos(n派+x)/cos[(n+1)派-x]}*tan(x-n派)cot[(n派/2
cos(x-三分之派)=3/4,则sin(六分之派+x)
求(sin(派-x)cos(3/2派-x)tanx)/(cos(2派-x)cot(x-派/2)sin(派/2-x))