3sin^2x+8sinxcosx-3cos^2x=0
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3sin^2x+8sinxcosx-3cos^2x=0
3sin^2x+8sinxcosx-3cos^2x=0
3sin^2x+8sinxcosx-3cos^2x=0
3sin^2x+8sinxcosx-3cos^2x
=(3sinx-cosx)(sinx+3cosx)=0
3sinx-cosx=0
3sinx=cosx
tanx=1/3,
x1=arctan(1/3)
sinx+3cosx=0
sinx=-3cosx
tanx=-1/3
x2=arctan(-1/3)
3sin^2x+8sinxcosx-3cos^2x=0
(3sinx-cosx)(sinx+3cosx)=0
1:sinx=cosx,tanx=1,x=arctan1
2:sinx=-3cosx,tanx=-3,x=arctan(-3 )
2sin平方x +cos平方x+3sinxcosx化简
∫sinxcosx/3+sin²x dx½ln(3+sin²x)+c
2根号3sinxcosx+2sin^2x的值域
函数y=sinxcosx-3sin^2(x)的最大值
化简 -根号3sin平方x+sinxcosx,
化简 -根号3sin平方x+sinxcosx,
3sin^2x+8sinxcosx-3cos^2x=0
3sin^2x+8sinxcosx-3cos^2x=5
化简sin(2x+π/3)-(根号3)sin²x+sinxcosx+(根号3)/2
已知sin(3pai-x)=-2sin(pai/2+x),则sinxcosx等于
已知tanx=2,则(1)1/4sin方x-3sinxcosx/cos方x+2sinxcosx
tanx=2,则1/4sin²x-3sinxcosx/cos²x+2sinxcosx=多少
sin²x-2cosx=2,则sinxcosx+3sinx+cosx为?sin²x-2cosx=2,则sinxcosx+3sinx+cosx为A 3B -3C 1D -1谢啦~
已知tanX=2求2sin^2X+sinXcosX-3cos^2X12333333333333333333333已知tanX=2求2sin^2X+sinXcosX-3cos^2X
f(x)=sin²x+根号3sinxcosx 化简
f(x)=sin(x^2)+(√3)sinxcosx+2cos(x^2) 化简
f(x)=sin(x^2)+(√3)sinxcosx+2cos(x^2) 化简
化简F(X)=2COSXCOSX(π/6-X)-根号3SIN^2X+SINXCOSX