EXAMIANS
The principal line is the line joining the principal point and
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In a spherical triangle ABC right angled at C, sin b equals to
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In the double application of principle of reversion, the apparent error is
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The orthogonal projection of the perspective centre on a tilted photograph, is called
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The correction for sag is
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For any star to be a circumpolar star, its
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The scale of a tilted photograph of focal length f, taken from an altitude H, along the plate parallel through plumb point, is
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The average eye base is assumed as
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The latitude of a place was obtained by subtracting the zenith distance of a star from its declination, the observed star was between
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The distance between the projection centre and the photograph, is called
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