https://sciencing.com/types-trigonometry-8652780.html

Apr 25, 2017 ... Unlike core or plane trigonometry, the sum of all angles in a triangle is greater than 180 degrees. Sine and cosine tables are used, as well as ...

https://en.wikipedia.org/wiki/Trigonometry

Trigonometry is a branch of mathematics that studies relationships between side lengths and ... Trigonometric functions have been extended as functions of a real or complex ... the law of sines for plane and spherical triangles, discovered the law of tangents for spherical triangles, and provided proofs for both these laws.

https://www.quora.com/What-is-plane-trigonometry

So, honestly speaking I didn't know what is plane trigonometry. Naturally, I googled. After reading at some sites I got to know it's something I ...

https://www.mathsisfun.com/algebra/trigonometry.html

Trigonometry (from Greek trigonon "triangle" + metron "measure"). Want to learn Trigonometry? Here is a quick summary. Follow the links for more, or go to ...

https://www.britannica.com/science/trigonometry

5 days ago ... 190–120 bce) was the first to construct a table of values for a trigonometric function. He considered every triangle—planar or spherical—as ...

https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1949-8594.1908.tb01200.x

plane trigonometry, both practical and disciplinary elements. If algebra and ... with respect to plane angles, whether forming a triangle or not. 8. Analytical ...

https://www2.clarku.edu/faculty/djoyce/trig/what.html

Trigonometry began as the computational component of geometry. For instance, one statement of plane geometry states that a triangle is determined by a ... of geometry, angles aren't measured, they're just compared or added or subtracted.

https://www.youtube.com/watch?v=z2_n8rHpOiA

Feb 2, 2011 ... Gulf Coast Community College instructional video Plane Trigonometry MAC 1114 Section 1.1 Angle Measures & Special Triangles.

https://www.khanacademy.org/math/trigonometry

Learn trigonometry for free—right triangles, the unit circle, graphs, identities, and more. ... Click here to start or continue working on the Trigonometry Mission.

http://www.rwgrayprojects.com/rbfnotes/trig/ptrig/trig.html

Review of Plane Trig. I will briefly review some of the relations used in plane trigonometry. ... Angles are given in either units of radians or units of degrees.