(Asin(wt+φ))’

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(Asin(wt+φ))’(Asin(wt+φ))’(Asin(wt+φ))’令wx+φ=u(Asin(wt+φ))''=(Asinu)''*u''=Awcos(wt+φ)(Asin(wt+φ))’=Aco

(Asin(wt+φ))’
(Asin(wt+φ))’

(Asin(wt+φ))’
令wx+φ=u
(Asin(wt+φ))'
=(Asinu)'*u'
=Awcos(wt+φ)

(Asin(wt+φ))’
=Acos(wt+φ)*w
=Awcos(wt+φ)