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anonymous

  • one year ago

MEDAL SOLVE (cos Θ − cos Θ)2 + (cos Θ + cos Θ)2

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  1. zepdrix
    • one year ago
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    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.\[\Large\rm (\cos \theta-\cos \theta)^2+(\cos \theta+\cos \theta)^2\]\[\Large\rm (0)^2+(2\cos \theta)^2\]

  2. zepdrix
    • one year ago
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    And then square both the 2, and the cosine.

  3. anonymous
    • one year ago
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    0 +2cos

  4. zepdrix
    • one year ago
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    No you still need to square the 2cos(theta).\[\Large\rm (2\cos \theta)^2=2^2\cos^2\theta\]

  5. anonymous
    • one year ago
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    8

  6. anonymous
    • one year ago
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    it is 4cos^2 theta

  7. zepdrix
    • one year ago
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    yes.

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