Statement 1: If cosalpha,cosbeta,a n dco...

Statement 1: If `cosalpha,cosbeta,a n dcosgamma` are the direction cosines of any line segment, then `cos^2alpha+cos^2beta+cos^2gamma=1.` Statement 2: If `cosalpha,cosbeta,a n dcosgamma` are the direction cosines of any line segment, then `cos2alpha+cos2beta+cos2gamma=1.`

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