if phi is the angle between line of emergence DE and normal DF at point D

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In the prevoious problem ,if phi is the angle between line of emergence DE and normal DF at point D, ratio of phi/ theta for positive value of theta will be
14
Oct
In the prevoious problem ,if phi is the angle between line of emergence DE and normal DF at point D, ratio of phi/ theta for positive value of theta will be if phi is the angle between line of emergence DE and normal DF at point D In the prevoious problem ratio of phi/ theta [...]
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