The doctrine of triangles a history of modern trigonometry de réir Van Brummelen, Glen

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Schaum's outline of precalculus de réir Safier, Fred

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Three-way journal writing effects on students' problem-solving and self-regulation skills in trigonometry de réir Lugtu, Ivy C.

Precalculus functions and graphs de réir Swokowski, Earl William 1926-, Cole, Jeffery A. 1955-

Schaum's outline of trigonometry de réir Moyer, Robert, Ayres, Frank 1901-1994

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The fractional trigonometry with applications to fractional differential equations and science de réir Lorenzo, Carl F., Hartley, Tom T.

A basic approach to precalculus trigonometry preparing to succeed in calculus de réir Kim, Young H., Kim, Youngsoo, Tameru, Ana, Yan, Wen

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

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

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