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Express cos10A in terms of sin5A
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1 vote
Express cos10A in terms of sin5A

User Jredburn
by
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1 Answer

1 vote

Answer:

1 - 2sin²5A

Explanation:

cos10A = cos2(5A) = cos²5A - sin²5A = 1 - sin²5A - sin²5A = 1 - 2sin²5A

User Probabilityzero
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