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Surveying

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

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

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Surveying
Intersection method of detailed plotting is most suitable for

plains
forests
urban areas
hilly areas

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

sin c sin B
sin c cos B
tan c tan B
cos c cos B

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Surveying
If ‘δ’ is the declination of the star and ‘φ’ is the latitude of the observer, then the azimuth of the star at elongation is given by

None of these
tan z = sec φ . cos δ
sin z = sec φ . cos δ
cos z = sec φ . cos δ

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Surveying
To obtain photographs of an area of 1000 m average elevation, on scale 1 : 30,000, with a camera of 30 cm focal length, the flying height is

5000 m
6000 m
7000 m
4000 m

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Surveying
The principal line is the line joining the principal point and

Perspective centre
Isocenter
Nadir
None of these

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