Triangulated category - Wikipedia
A triangulated category is an additive category D with a translation functor and a class of triangles, called exact triangles[2] (or distinguished triangles), satisfying the following properties (TR 1), (TR 2), (TR 3) and (TR 4).
Exact trigonometric values - Wikipedia
While trigonometric tables contain many approximate values, the exact values for certain angles can be expressed by a combination of arithmetic operations and square roots.
Exact Trig Values - GCSE Maths - Steps, Examples & Worksheet
Exact trig values are the exact trigonometric values for certain angles that you are expected to know for GCSE mathematics. In trigonometry at GCSE there are three trigonometric ratios that we use, sine, cosine and tangent, though we write them as sin, cos and tan.
Special Right Triangles Formulas. 30 60 90 and 45 45 90 special …
Special Right Triangles (30-60-90 and 45,45,90) triangles explained with formulas, examples and pictures.
Special Angle Values: 30-60-90 and 45-45-90 Triangles - Purplemath
Explains a simple pictorial way to remember basic reference angle values. Provides other memory aids for the values of trigonometric ratios for these "special" angle values, based on 30-60-90 triangles and 45-45-90 triangles.
Finding exact Trig Values - Online Math Help And Learning …
How to find the exact trigonometric values: sin, cos, tan without a calculator, How to use the CAST rule, examples and step by step solutions, GCSE Maths
4.015 Exact value triangles | Year 11 Maths - Mathspace
Free lesson on Exact value triangles, taken from the Trigonometry topic of our NSW Senior Secondary 2020 Editions Year 11 textbook. Learn with worked examples, get interactive applets, and watch instructional videos.
5.01 Exact values in right-angled triangles - Mathspace
These triangles are called exact value triangles, and they look like this: 45 degree angles. Below is a right-angled isosceles triangle, with the equal sides of $1$1 unit. Using Pythagoras' theorem, we can work out that the hypotenuse is $\sqrt {2}$√2 units.
Triangles - Equilateral, Isosceles and Scalene - Math is Fun
A triangle has three sides and three angles. The three angles always add to 180°. Equilateral, Isosceles and Scalene. There are three special names given to triangles that tell how many sides (or angles) are equal. There can be 3, 2 or no equal sides/angles: How to remember? Alphabetically they go 3, 2, none:
Special Right Triangles - MathBitsNotebook (A2)
If you remember the labeled triangles below, you will be able to quickly express the exact value of any of the six trigonometry functions for angles of 30º, 45º, and 60º. These angles are also commonly used as reference angles in other quadrants.