What is true dip angle and apparent dip angle formula in relation with cos theta?

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Q. If

θ_{1}

and

θ_{2}

be the apparent angles of dip observed in two vertical planes at right angles to each other, then the true angle of dip

θ

is given

Q. At an angle

{cos}^{- 1} (\frac{1}{\sqrt{3}})

to the magnetic meridian, the apparent dip is

60^{\circ}

. The true dip at the place is :

Q. If

θ_{1}

and

θ_{2}

be the apparent angles of dip observed in two vertical planes at right angles to each other, then the true angle of dip

θ

is given by:

The angle of dip at a place is $δ$ . If the dip is measured in a plane making an angle $θ$ with the magnetic meridian, the apparent angle of dip $δ_{1}$ will be :

Q. The true value of angle of dip at a place is

60^{\circ}

, the apparent dip in a plane inclined at an angle of

30^{\circ}

with magnetic meridian is

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