a. b. cos 90 = 0 are you kidding me?

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• thumb_up thumb_down +42

  a. b. cos 90 = 0 are you kidding me?

• thumb_up thumb_down +34

  No one can calculate it..

• thumb_up thumb_down +33

  WTF?

• thumb_up thumb_down +26

  Pythagorean theorem ?

• thumb_up thumb_down +15

  WHATS MATH?