guccigriff
guccigriff
Today at 3:02 PM
Mathematics
Answered
Sin 4x=4sinx times cos x times cos 2x
Answer :
kcmabanasanchez
kcmabanasanchez
Today at 3:07 PM
Answer:
Since
sin
2
x
=
2
sin
x
cos
x
, than:
sin
4
x
=
2
sin
2
x
cos
2
x
=
2
⋅
2
sin
x
cos
x
⋅
cos
2
x
=
4
sin
x
cos
x
cos
2
x
.
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