Question

(cos Θ + cos Θ)2 + (cos Θ + cos Θ)2
Please help me solve.
Answer choices:
sin2 Θ
4
8cos2Θ
cos2 Θ

Answer 1

Could you also write \[(2Cos \theta)^{2}+(2Cos \theta)^{2}=4Cos ^{2}\theta +4Cos ^{2} \] and take it on from there?

Answer 2

I don't know what to do from there

Answer 3

Is the answer 4?

Answer 4

Ooop left off theta on last term.
Could you just simply add and get \[8Cos ^{2}\theta \]

Answer 5

Or am I just looking at to simply?

Answer 6

Who knows. You're probably right. I'll let you know in a few :)

Answer 7

O.K. Good luck with your study, but luck alone is not enough......did you follow and agree with that method??

Answer 8

Yes and you were right. Thank you so much!