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

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

Trigonometry av Larson, Ron

Trigonometry av Lial, Margaret L.

Trigonometry for dummies av Sterling, Mary Jane

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

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

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

Algebra and trigonometry av Larson, Ron 1941-

Schaum's outline of geometry av Rich, Barnett 1906-, Thomas, Christopher 1973-

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