fernandezale99 fernandezale99

12-06-2017
Mathematics

contestada

(cos θ + cos θ)2 + (cos θ + cos θ)2

Please help!
These are the options
A.sin^θ
B.4
C.8cos ^2 θ
D.cos ^θ

Respuesta :

jdoe0001 jdoe0001

12-06-2017

[tex]\bf [cos(\theta)+cos(\theta)]^2+[cos(\theta)+cos(\theta)]^2\implies [2cos(\theta)]^2+[2cos(\theta)]^2 \\\\\\ 2^2[cos(\theta)]^2+2^2[cos(\theta)]^2\implies 4[cos(\theta)]^2+4[cos(\theta)]^2 \\\\\\ 8[cos(\theta)]^2\iff 8cos^2(\theta)[/tex]

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