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2sin x sin x 2cos x cos x
y=|sin x| y=sin|x| y=|cos x| y=cos|x|
y=sin xcos x y=sin2x y=tan 2x y=sin 2x+cos 2x
y=cos 2x y=-sin 2x y=sin y=sin
sin 2x 2sin x sin xcos x cos2x
)y=2sin(2x+) ( )y=2sin(2x+) ( )y=2sin(2x–) ( )y=2sin(2x–)
y=2cos2x y=2sin2x y=1-sin(2x+) y=cos2x
y=sin x y=cos x y=sin 2x y=cos 2x
y=sin22x﹣cos22x y=sin2x+cos2x y=sin2xcos2x
y=cos 2x+sin 2x y=cos 2x-sin 2x y=sin 2x-cos 2x y=sin xcos x
y=|sinx| y=sin|x| y=-sin|x| y=-|sinx|
y=sin(x+) y=sin(x+) y=sin(x-) y=sin(x+)-
y=sin x y=xe2 y=x3-x y=ln x-x
sin x cos x 2sin x 2cos x
y=6sin(5x+15)+2 y=6sin(5x-15)+2 y=6sin(5x+15)-2 y=6sin(5x-15)-2