A dip needle lies initially in the magnetic merdian when it shows an angle of dip `theta` at a
Channel: Doubtnut
Date: 2020-01-19

A dip needle lies initially in the magnetic merdian when it shows an angle of dip `theta` at a place. The dip circle is rotated through an angle x in the horizontal plane and then it shows an angle of dip `theta^(\')`. Then `tantheta^(\')/tantheta` is