(1-cos2x)+sin2x=根号2(sin2x cosπ/4-cos2x sinπ/4)+1这一步骤是怎样得出的呢 请说明

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(1-cos2x)+sin2x=根号2(sin2xcosπ/4-cos2xsinπ/4)+1这一步骤是怎样得出的呢请说明(1-cos2x)+sin2x=根号2(sin2xcosπ/4-cos2xsin

(1-cos2x)+sin2x=根号2(sin2x cosπ/4-cos2x sinπ/4)+1这一步骤是怎样得出的呢 请说明
(1-cos2x)+sin2x=根号2(sin2x cosπ/4-cos2x sinπ/4)+1
这一步骤是怎样得出的呢 请说明

(1-cos2x)+sin2x=根号2(sin2x cosπ/4-cos2x sinπ/4)+1这一步骤是怎样得出的呢 请说明
(1-cos2x)+sin2x=根号2Sin(2x-π/4)+1=根号2(sin2x cosπ/4-cos2x sinπ/4)+1

括号打开 cosπ/4=sinπ/4=根号2/2
再X后面括号前面的根号2=1