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Surveying

Surveying
In a spherical triangle ABC, right angled at C, sin b equals

tan a cot A
sin a cos A
cot A tan a
cos a sin A

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Surveying
The scale of a tilted photograph of focal length f, taken from an altitude H, along the plate parallel through plumb point, is

f/H
f/H sec θ
f/H cos ½θ
f sec θ/H

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Surveying
The position of a heavenly body on the celestial sphere can be completely specified by

Its altitude and azimuth
Its declination and hour angle
All listed here
Its declination and right ascension

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Surveying
The normal longitudinal overlap is generally kept

0.6
0.5
0.75
0.7

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Surveying
If the reduced bearing of a line AB is N60°W and length is 100 m, then the latitude and departure respectively of the line AB will be

+70.7 m, -50 m
+86.6 m, -50 m
+50 m, -86.6 m
+50 m, +86.6 m

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Surveying
Which of the following angles can be set out with the help of French cross staff?

45° only
either 45° or 90°
90° only
any angle

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