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BlackZzzverrR [31]
3 years ago
11

Express cos10A in terms of sin5A

Mathematics
1 answer:
Mariulka [41]3 years ago
7 0

Answer:

1 - 2sin²5A

Step-by-step explanation:

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

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