已知sin^2X+sinX=1,求cos^4X=cos^2X的值

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已知sin^2X+sinX=1,求cos^4X=cos^2X的值已知sin^2X+sinX=1,求cos^4X=cos^2X的值已知sin^2X+sinX=1,求cos^4X=cos^2X的值sin^

已知sin^2X+sinX=1,求cos^4X=cos^2X的值
已知sin^2X+sinX=1,求cos^4X=cos^2X的值

已知sin^2X+sinX=1,求cos^4X=cos^2X的值
sin^2X+sinX=1,sinX=1-sin^2X=cos^2X cos^4X=sin^2X
cos^4X=cos^2X中间应该是+?
cos^4+cos^2X=sin^2X+cos^2X=1