Question

a dip circle is placed in geographic meridian at a place where dip and declination are known to be respectively 30°and 60°.What dip will be given by dip circle

Answer 1

Answer:-

tan Ф = tan Ф'/cos α

Ф - apparent dip

Ф' - true dip

α - angle by dip circle

Therefore, tan 30 = tan Ф'/cos α

Ф' = Ф - 90

if 60 is new apparent dip, then

tan 60 = tan Ф/cos (α - 90) = tan Ф/sin α

Therefore, sin α = tan Ф/ √3  ...(1)

Now, tan α = sin α/cos α,  

So cos α = sin α/tan α

cos ² α = sin² α/tan² α

Now, cos ² α + sin² α = 1

1 = tan ²Ф (1/3 + 3)

1 = tan ²Ф (4/3)

Ф = tan ^ -1 (2/√3)

Answer 2

Answer:

Explanation:

Ф = tan ^ -1 (2/√3) . Mark as brainliest pa please click