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snow_tiger [21]
2 years ago
9

ONLY ANSWER IF YOU KNOW, SHOW WORK

Mathematics
1 answer:
yulyashka [42]2 years ago
6 0

Answer:

hello,

Step-by-step explanation:

cos(3\theta)+cos(4\theta)\\\\=2*cos(\dfrac{4\theta+3\theta}{2} )*cos(\dfrac{4\theta-3\theta}{2} )\\\\\boxed{=2*cos(\dfrac{7\theta}{2} )*cos(\dfrac{\theta}{2} )}

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