∫(1/sin^2x+1)d(sinx)=

∫(1/sin^2x+1)d(sinx)= S(1-sin^2x)d(sinx)为什么=sinx-1/3sin^3x? ∫(1/sin²x+1)d(sinx) (sin^x/sinx-cosx)-sinx+cosx/tan^2x-1 1-2sinx*sin(60+x)sin(60-x) cosx-sinx/1+sin^2x不定积分 sinx/(1+sin^2x)的积分 ∫sinx/(1+sin^4x) ∫sinx/(1+sin^4x) dx 求证 sin^2x/(sinx-cosx)-(sinx+cosx)/tan^2 x-1=sinx+cosx 化简[sin^2(x)]/(sinx-cosx)-(sinx+cosx)/[tan^2(x)-1]-sinx x-0 x^2sin(1/x)/sinx (sinx-1)tanx怎么化简成[（sinx-sinπ/2）/sin（x+π/2）]sinx,x趋于π/2 ∫secx dx=?∫secx dx=∫(dx)/cosx=∫(cosx/cos²x)dx =∫(d sinx)/(1-sin²x) =(1/2)ln│(1+sinx)/(1-sinx)│+C =(1/2)ln(1+sinx)²/(1-sin²x)+C =(1/2)ln[(1+sinx)/cosx]²+C =ln│secx+tanx sinx/x,(sinx/x)^2,sin(x^2)/(x^2)的大小 x∈(0,1] (1+Sinx+Cosx+SinxCosx)/(Sinx+Sin^2 x)怎么化简成(Cscx+1+Cotx+Cosx)/(1+Sinx)? 求证sin^2x/sinx-cosx-(sinx+cosx)/(tan^2-1)=sinx+cosx谢谢GGJJ 求函数的值域：(1)y=|sinx|-2sinx (2)y=sin|x| |sinx| 求函数的值域：(1)y=|sinx|-2sinx (2)y=sin|x|+|sinx|