An extraterrestrial spaceship is moving away from the earth after an unpleasant encounter with its inhabitants. As it departs, the spaceship fires a missile toward the earth. An observer on earth measures that the spaceship is moving away with a speed of 0.585c . An observer in the spaceship measures that the missile is moving away from him at a speed of 0.800c

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Visit http://ilectureonline.com for more math and science lectures! In this video I will solve tan^2(theta)-4=0, theta=?

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We derive from first principles the main laws of rational trigonometry, using the concepts of quadrance and spread to replace the usual distance and angle. Most everything works out much simpler. A screenshot PDF which includes WildTrig1 to 35 can be found at my WildEgg website here: http://www.wildegg.com/store/p114/product-wild-trig-A-screenshot-pdf

Visit http://ilectureonline.com for more math and science lectures! In this video I will find the (derivative of)tanhx=? or d/dx(tanhx)=? Next video in the series can be seen at: https://youtu.be/j6DoUnJYwr4

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