Тригонометрические функции

We’re back in HD, covering an in-depth look at trigonometry. We cover the gamut here: theta, conversions between radians and degrees, the six trig functions (sin, cos, tan, csc, sec, cot), Pythagorean Theorem, inverse trig, 30-60-90 triangles, 45-45-90 triangles, quadrants, and pi are no match for the math authority here. YAY MATH! Please visit