Trigonometric constants expressed in real radicals in a regular polygon: a vertex, an edge center containing that vertex, and the polygon center. An "n"-gon can be divided into 2"n" right triangles with angles of , 90 − , 90} degrees, for "n" in 3, 4, 5, … Constructibility of 3, 4, 5, and 15-sided polygons are the basis, and angle bisectors allow multiples of two to also be derived. In degree format, sin and cos of 0, 30, 45, 60, and 90 can be calculated from their right angled triangles, using the Pythagorean theorem. In radian format, sin and cos of / 2 can be expressed
How to Talk to a Liberal (If You Must) How to Talk to a Liberal (If You Must) How to Talk to a Liberal (If You Must) is a 2004 book by Ann Coulter. The book is a collection of columns written by Coulter on liberalism, the war on terror, and the media. In it, Coulter offers advice gleaned from her experience as a political pundit. She attacks "The New York Times" and the Democratic Party, and sums up her opinion of liberals in two sentences: "Want to make liberals angry? Defend the United States." In arguing with liberals, she advises, "don't be defensive", "always outrage the enemy", and