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  • Today at 8:10 PM
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Answered

Sin 4x=4sinx times cos x times cos 2x

Answer :

kcmabanasanchez
kcmabanasanchez kcmabanasanchez
  • Today at 8:16 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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