Express the given harmonic functions as Asin(wt+alpha) with lead phase alpha. (a) x(t)=-4cos(wt)+7sin(wt) (b) y(t)=-4sin(wt)+7cos(wt).

Express the given harmonic functions as Asin(wt+alpha) with lead phase alpha. (a) x(t)=-4cos(wt)+7sin(wt) (b) y(t)=-4sin(wt)+7cos(wt).

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Express the given harmonic functions as Asin(wt+alpha) with lead phase alpha. (a) x(t)=-4cos(wt)+7sin(wt) (b) y(t)=-4sin(wt)+7cos(wt).

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