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If a magnet is suspended at an angle 30o to the magnetic meridian, it makes an angle of 45o with the horizontal. The real dip is

(a)${\mathrm{tan}}^{-1}\left(\frac{\sqrt{3}}{2}\right)$

(b)${\mathrm{tan}}^{-1}\left(\sqrt{3}\right)$

(c)${\mathrm{tan}}^{-1}\left(\sqrt{\frac{3}{2}}\right)$

(d)${\mathrm{tan}}^{-1}\left(\frac{2}{\sqrt{3}}\right)$