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In this paper, the plane with the generalized taxicab metric is considered and the trigonometric functions and the norm are defined. Then, the cosine and the sine functions are developed by using the reference angle with respect to the generalized taxicab metric. It is shown that Schwarz's inequality is valid under restricted case of d Tg-metric. Finally, the area of any triangle in the plane with the generalized taxicab metric is given as the geometrical interpretation that contains the trigonometric functions and norm.

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In this work, the intuitionistic fuzzy versions of Menelaus and Ceva's theorems in intuitionistic fuzzy projective plane are de…ned and the conditions to the intuitionistic fuzzy versions of Menelaus and Ceva 6-…gures are determined.