sinx(sin^-1(X)/cos^-1(x) 化简
化简sin^4x/sinx-cosx - (sinx+cosx)cos^2x/tan^2x-1
化简{sin(π+x)}/1+cos(3π-x)根号下(tanx-sinx)/(tanx+sinx)
sinx*( cos x)^3/(1+sin^2x)的不定积分
证明成立:[cos(3x)-sin(3x)]/(cosx+sinx)=1-2sin(2x).
化简sin^2x/(1+cosx)-cos^2x/(1+sinx)
化简1+sin²x-cos²x-sinx/2sinxcosx-cosx
1、sin(2x+B)/sinx - 2cos(x+B)=sinB/sinx
化简sin(x+y)sinx+cos(x+y)cosx等于?
化简sin(x+y)sinx+cos(x+y)cosx
化简cos(x+3o.)CoSx+Sin(x+30.)Sinx
化简cos(x+y)sinx-sin(x+y)cosx
为什么1+sin²X+cos²X+2sinX+2cosX+2sinXcosX=(1+sinX+cos