Discussion
A section drawn at 45 degrees to the strike of a bed dipping at 40 degrees will show an apparent dip that is
Answer: B
Correct answer: less than 40 degrees
Any section oblique to the strike shows an apparent dip smaller than the true one, so it must be under 40 degrees. Specifically \( \tan\delta_{app} = \tan 40^\circ \cos 45^\circ = 0.594 \), giving about 30.7 degrees - not 20, since the relation works on the tangents rather than on the angles themselves.
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