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hram777 [196]
2 years ago
11

How to prove it's an identity sin y + sin 3y + sin 5y + sin 7y = 4 cos y cos 2y sin 4y

Mathematics
1 answer:
Gennadij [26K]2 years ago
7 0

Answer:

0.9777102203

Step-by-step explanation:

the identity is 0.9777102203

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