化简:根号1-sin^2*2 1-cos^4-sin^4x/1-cos^6x-sin^6x(1)根号1-sin^2*2)(2)(1-cos^4-sin^4x)/(1-cos^6x-sin^6x )(1)1-sin^2*2都在根号下

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/18 05:47:06

化简:根号1-sin^2*2 1-cos^4-sin^4x/1-cos^6x-sin^6x(1)根号1-sin^2*2)(2)(1-cos^4-sin^4x)/(1-cos^6x-sin^6x )(1)1-sin^2*2都在根号下
化简:根号1-sin^2*2 1-cos^4-sin^4x/1-cos^6x-sin^6x
(1)根号1-sin^2*2)(2)(1-cos^4-sin^4x)/(1-cos^6x-sin^6x )
(1)1-sin^2*2都在根号下

化简:根号1-sin^2*2 1-cos^4-sin^4x/1-cos^6x-sin^6x(1)根号1-sin^2*2)(2)(1-cos^4-sin^4x)/(1-cos^6x-sin^6x )(1)1-sin^2*2都在根号下
2弧度在第二象限
因此sin2>0,cos2<0
由正弦、余弦的平方和为1可得根号(1-sin^2*2)=-cos2