Question
Which expression below can be obtained from 22sin*a by using a power reducing formula?
Select the correct answer below:
O 1 + 11lcos (4a)
O 3 - 11cos (2a) + cos (4a)
4.
+11cos (2a) + cos (4a)
* - 11cos (2a)+11cos (4a)
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Transcribed Image Text

Which expression below can be obtained from 22sin*a by using a power reducing formula? Select the correct answer below: O 1 + 11lcos (4a) O 3 - 11cos (2a) + cos (4a) 4. +11cos (2a) + cos (4a) * - 11cos (2a)+11cos (4a)

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