Analytic Trigonometry

1. / an identity;(u + v), (u - v)
3. / a^2 = b^2 + c^2 - 2bc cosA, b^2 = a^2 + c^2 - 2ac cosB, c^2 = a^2 + b^2 - 2ab cosC
7. / all values of the variable for which both sides of the equation are defined
8. / an identity; cos^2x + sin^2x = 1, 1 + tan^2x = sec^2x
9. / identity involving a trigonometric function of u/2
11. / for a basic trigonometric function f, an identity relating f(x) and f(-x)
12. / 0.5bcsinA, 0.5acsinB, 0.5absinC
14. / the set of all such values
15. / 0.5(a + b + c)
18. / created Heron's Theorem

1. / ambiguous case
2. / solids with faces that are congruent polygons having equal angles and sides
4. / the denotation of s in Heron's Formula
5. / triangle with angles less than 90
6. / an identity that relates cosine and co-secant respectively
10. / also known as Law of cosines, contains that classic theorem as a special case
11. / triangle with one angle more than 90 degrees
13. / graph of a quadratic function
16. / side, side, side
17. / states ratio of the sine of an angle to the length of its opposite side