Plane & spherical trigonometry a tetrahedron approach od Mamhot, Millard R., Endam, Joemar C., Mamhot, Alice A., Banagua, Emelyn C., Bantug, Jenette S.

Worktext in college trigonometry od Domingo, Alleli C., Dimasuay, Lynie B., Lawas, Vernel M., Lubag, Sharon P., Almonte, Velimor D.

Plane & spherical trigonomerty a tetrahedron approach od Mamhot, Millard R., Endam, Joemar C., Mamhot, Alice A., Banagua, Emelyn C., Bantug, Jenette S.

Plane trigonometry od Carpio, Joy N., Guillermo, Jaymie M.

Plane and spherical trigonometry text / workbook od Baltazar, Ethel Cecille M., Dy, Ana Liza M., Vidar, Melvin A.

Algebra and trigonometry od Larson, Ron 1941-

College algebra od Larson, Ron 1941-

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Basic algebra and spherical trigonometry od Exconde, Maria Rosario C., Sabino, Lilibeth D., Marquez, Romel L., Fajardo, Ira A.

Trigonometry a worktext od Calingasan, Recto Rex M.

Stewart's algebra and trigonometry od Stewart, James