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Nisa Triyatul Fitri, Arif Muchyidin, Reza Oktiana Akbar. Mastery of Trigonometry Material and Its Effect on Students’ Ability to Solving Three Dimensional Problems. J.Math.Instr.Soc.Res.Opin. [Internet]. 2022 Jul. 30 [cited 2026 Jun. 15];1(2):97-106. Available from: https://journal-gehu.com/index.php/misro/article/view/23