LivCastillo LivCastillo

08-03-2021
Mathematics

contestada

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

Respuesta :

nessablinks3 nessablinks3

08-03-2021

Answer:

0.9777102203

Step-by-step explanation:

the identity is 0.9777102203

Answer Link

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