Let P and Q be antipodal (opposite) points on a sphere of radius r centered at the
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Let P and Q be antipodal (opposite) points on a sphere of radius r centered at the origin and let R be a third point on the sphere (Figure 27). Prove thatare orthogonal.
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PR and QR
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Thus We denote the vectors OP and OR by We now show that PR ...View the full answer
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