anonymous
  • anonymous
MEDAL SOLVE (cos Θ − cos Θ)2 + (cos Θ + cos Θ)2
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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zepdrix
  • zepdrix
Hey there :) Unless your teacher wants you to do this a specific way, notice that you have a cosine minus cosine, which gives you zero there. And in the other brackets, simply combine your like-terms.\[\Large\rm (\cos \theta-\cos \theta)^2+(\cos \theta+\cos \theta)^2\]\[\Large\rm (0)^2+(2\cos \theta)^2\]
zepdrix
  • zepdrix
And then square both the 2, and the cosine.
anonymous
  • anonymous
0 +2cos

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zepdrix
  • zepdrix
No you still need to square the 2cos(theta).\[\Large\rm (2\cos \theta)^2=2^2\cos^2\theta\]
anonymous
  • anonymous
8
anonymous
  • anonymous
it is 4cos^2 theta
zepdrix
  • zepdrix
yes.

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