y=sin(x+7派/4)+cos(x-3派/4)

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y=sin(x+7派/4)+cos(x-3派/4)y=sin(x+7派/4)+cos(x-3派/4)y=sin(x+7派/4)+cos(x-3派/4)y=cosXcos3派/4-sinXsin3派/4

y=sin(x+7派/4)+cos(x-3派/4)
y=sin(x+7派/4)+cos(x-3派/4)

y=sin(x+7派/4)+cos(x-3派/4)
y=cosXcos3派/4-sinXsin3派/4