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anonymous
 one year ago
Medal and follow if you can help me solve this.
(cos θ + cos θ)^2 + (cos θ + cos θ)^2
a)sin2 θ
b)4
c)8cos2 θ
d)cos2 θ
anonymous
 one year ago
Medal and follow if you can help me solve this. (cos θ + cos θ)^2 + (cos θ + cos θ)^2 a)sin2 θ b)4 c)8cos2 θ d)cos2 θ

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Jhannybean
 one year ago
Best ResponseYou've already chosen the best response.2\[(\cos(\theta) +\cos(\theta))^2 +(\cos(\theta)+\cos(\theta))^2= (2\cos(\theta))^2+(2\cos(\theta))^2\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Ah okay so in my head i just got 8cos2 θ

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0is that correct in my math? I normally never make calculation mistakes

Jhannybean
 one year ago
Best ResponseYou've already chosen the best response.2yeah that's the correct answer, but can you explain to me how you got it?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I just did it in my head. Distributed it. Maybe i'm lucky?
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