y=根号2(cos^2x-sin^2x)+2根号2sinxcosx化简
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y=根号2(cos^2x-sin^2x)+2根号2sinxcosx化简y=根号2(cos^2x-sin^2x)+2根号2sinxcosx化简y=根号2(cos^2x-sin^2x)+2根号2sinxc
y=根号2(cos^2x-sin^2x)+2根号2sinxcosx化简
y=根号2(cos^2x-sin^2x)+2根号2sinxcosx化简
y=根号2(cos^2x-sin^2x)+2根号2sinxcosx化简
y=cos^2x-sin^2x+2sinxcosx
=(2cos^2x-1)+sin2x
=cos2x+sin2x
=√2sin(2x+∏/4)
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公式给你你去套sinxconx=sin2x
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y=根号2(cos^2x-sin^2x)+2根号2sinxcosx化简
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