• slot gacor 2024slot danatogelmarket1slot danasigma168
  • A. Yusha’u, M. 2013. “Difficult Topics in Junior Secondary School Mathematics: Practical Aspect of Teaching and Learning Trigonometry”. Scientific Journal of Pure and Applied Sciences 2 (4):161-74. http://sjournals.com/index.php/sjpas/article/view/984.