Basic Trig Functions
![trig functions](/uploads/1/6/6/0/16603678/479222825.gif?367)
1) The basics: http://www.mathsisfun.com/sine-cosine-tangent.html
2) Sparknotes: http://www.sparknotes.com/math/precalc/trigonometricfunctions/section2.rhtml
3) Video: https://www.youtube.com/watch?v=NO4H4YROdqk
2) Sparknotes: http://www.sparknotes.com/math/precalc/trigonometricfunctions/section2.rhtml
3) Video: https://www.youtube.com/watch?v=NO4H4YROdqk
Solving Triangles (that aren't right triangles)
![Picture](/uploads/1/6/6/0/16603678/81774_orig.png)
1) (hint: I write this at the top of my paper. Then, whenever I come to a problem that asks me to “solve” the triangle (aka find all the missing sides and angles) I start by filling in all the information that I’m given. Remember that if you have 2 angles, in a roundabout way you’re also given the 3rd , right? What do the interior angles of a triangle ALWAYS total?
![Picture](/uploads/1/6/6/0/16603678/8028283.png?153)
2) the highlighted parts are interchangeable as long as you have 2 sides and the included angle. In other words, as long as you have 1 of each letter (a, b, c). Example, you could use sides bc if you use angle A. Or, use sides ac if you use angle B. make sense?
Law of Sines
![Picture](/uploads/1/6/6/0/16603678/318830384.gif)
1) Side Angle Side Formula for finding the area of a triangle: http://www.mathwarehouse.com/trigonometry/area/side-angle-side-triangle.php
2) Law of Sines: http://www.mathsisfun.com/algebra/trig-sine-law.html
3) Law of Sines: http://hyperphysics.phy-astr.gsu.edu/hbase/lsin.html
4) Law of Sines: http://mathworld.wolfram.com/LawofSines.html
2) Law of Sines: http://www.mathsisfun.com/algebra/trig-sine-law.html
3) Law of Sines: http://hyperphysics.phy-astr.gsu.edu/hbase/lsin.html
4) Law of Sines: http://mathworld.wolfram.com/LawofSines.html
The Ambiguous Case of Sines
![Picture](/uploads/1/6/6/0/16603678/663042843.png)
1) Explanation and practice: http://www.regentsprep.org/Regents/math/algtrig/ATT12/lawofsinesAmbiguous.htm
2) Videos and explanations: http://www.mathwarehouse.com/trigonometry/law-of-sines/ambiguous-case-of-law-of-sines.php
2) Videos and explanations: http://www.mathwarehouse.com/trigonometry/law-of-sines/ambiguous-case-of-law-of-sines.php
Law of Cosines
![Picture](/uploads/1/6/6/0/16603678/480137663.gif)
1. Explanation: http://www.mathsisfun.com/algebra/trig-cosine-law.html
Trigonometric Identities
![Picture](/uploads/1/6/6/0/16603678/359746855.gif?185)
1) Explanation: http://www.purplemath.com/modules/idents.htm
2) Verifying Identities MOOC, https://www.udemy.com/trigonometry_trigonometricidentitiestwo/
3) List of Identities: http://www.mathwords.com/t/trig_identities.htm
4) Videos, examples: https://www.khanacademy.org/math/trigonometry/less-basic-trigonometry
2) Verifying Identities MOOC, https://www.udemy.com/trigonometry_trigonometricidentitiestwo/
3) List of Identities: http://www.mathwords.com/t/trig_identities.htm
4) Videos, examples: https://www.khanacademy.org/math/trigonometry/less-basic-trigonometry
The Unit Circle
![Picture](/uploads/1/6/6/0/16603678/527713488.gif?322)
1) Interactive Unit Circle: http://www.touchmathematics.org/topics/trigonometry