Surveying
According to Napier's Rules of circular parts for a right angled triangle, sine of middle part equals the product of

Cosines of two adjacent parts
Tangents of two adjacent parts
Both (A) and (B) above
Sines of two adjacent parts

ANSWER DOWNLOAD EXAMIANS APP

Surveying
Accidental errors

Do not follow any definite mathematical law
All of these
Are generally small
Cannot be removed by applying corrections to the observed values

ANSWER DOWNLOAD EXAMIANS APP