# Civil Engineering - Surveying - Discussion

### Discussion :: Surveying - Section 1 (Q.No.35)

35.

If θ is the slope of the ground and l is the measured distance, the correction is

 [A]. 2l sin2 θ/2 [B]. 2l cos2 θ/2 [C]. 2l tan2 θ/2 [D]. 2l cot2 θ/2.

Explanation:

No answer description available for this question.

 Danesh said: (Jul 15, 2014) Slope correction= L-D. Here L=l. D=lcos@. So Correction = l-lcos@. = l(1-cos@). = 2lsin^@/2.

 Vamsi Suppu said: (Sep 29, 2014) Slope correction = L-D. L=l. cos@=l/D. D=ICOS@. Correction = L-D. = l-lcos@. = l(1-cos@). = l(2sin@/2).

 Saravanaraja said: (Jun 29, 2017) How D=lcosθ?

 Akki said: (Sep 8, 2018) D means? Give expansion for the formula.

 Priyanka Shah said: (Nov 18, 2018) @All. how comes D=I cosθ. Please explain it.

 Ameiry Hassan said: (Dec 26, 2018) Slope correction = l-D, where l is sloping distance and D horizontal distance, construct a right-angled triangle ABC whose hypotenuse is l, adjacent D and the angle subtended between l and D be theta (θ) solve for D using trigonometric ratio u will get D= lcosθ then recall, Correction = l-D =l-lcosθ = l(1-cos θ) Using the concept of half angle formula 1-cosθ= 2sin^2θ/2 and therefore correction= 2lsin^2(θ/2).

 Kuldeep Kumar said: (Aug 15, 2020) Right answer is A.