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

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

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

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

Algebra and trigonometry par Larson, Ron 1941-

College algebra par Larson, Ron 1941-

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Trigonometry a worktext par Calingasan, Recto Rex M.

Stewart's algebra and trigonometry par Stewart, James