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a fost răspuns

derivati :
a) f(x)=(3x+4)cosx
b)f(X)=2cosx-3/sinx+2

Răspuns :

Veronica0
a) (3x+4)'*cosx+cosx'(3x+4)=3cosx-sinx(3x+4)
b) -2sinx-3'*sinx+sin'*3/sin^2x=-2sinx+3cosx/sin^2x