Sarah3262
Sarah3262 Sarah3262
  • 19-03-2019
  • Mathematics
contestada

2cos2ysin2y
simplify​

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Ammimochi
Ammimochi Ammimochi
  • 19-03-2019

Reorder 2 cos (2y) and sin (2y)

= sin (2y)(2 cos(2y))

Remove parenthesis

= sin (2y) * 2 cos (2y)

Reorder sin (2y) and 2

= 2 * sin (2y) cos (2y)

Apply the sine double-angle identity

= sin (2(2y))

Now multiply 2 by 2

= sin (4y)

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