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The true value of dip at a place is 30^(...

The true value of dip at a place is `30^(@)` . The vertical plane carrying the needle is turned through `45^(@)` from the magnetic meridian . Calculate the apparent value of dip .

Text Solution

Verified by Experts

`tan del _(A) = (tan del )/( cos alpha ) = ( tan 30^(@))/(cos 45^(@))`
`=(1)/(sqrt3) xx sqrt2 = sqrt ((2)/(3))`
`del _(A) = tan ^(-1) (sqrt ((2)/(3)))`
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