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

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

Trigonometry by Larson, Ron

Trigonometry by Lial, Margaret L.

Trigonometry for dummies by Sterling, Mary Jane

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

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

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

Algebra and trigonometry by Larson, Ron 1941-

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

Available for University of the Philippines Diliman via McGraw-Hill Access Engineering. Click here to access
Also available remotely for University of the Philippines Diliman via McGraw-Hill Access Engineering. Click here to access thru EZproxy