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Mathematics, 20.02.2020 08:50 bacon950
Consider a sphere of radius R > 0. Take two antipodal points A and B on the sphere, and another point C on the sphere. Check that the angle ACB is a right angle.
Use only vectors. No solution involving classical geometry or coordinates will be accepted.
You may want to draw a picture, and introduce a good coordinate system.
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Consider a sphere of radius R > 0. Take two antipodal points A and B on the sphere, and another p...
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