radian

The radian is a of angle used in the higher mathematics. The magnitude of an angle $\\alpha$ is one radian, if the arc corresponding the angle $\\alpha$ as a central angle of a circle is equally long as the radius of the circle. Thus, a radian is equal to $\\frac{180}{\\pi}$ , minutes and seconds approximately $57^{\\mathrm{o}}\\,17^{\\prime}\\,44.80625^{\\prime\\prime}.$

In degrees, a circle has 360 degrees, while in radians a circle has $2\\pi$ radians. In fact, many angles of equilateral polygons are equal to a multiple of $\\pi$ divided by some integer: for example, the interior angle of an equilateral triangle’s vertex is $\\frac{\\pi}{3}$ , while the interior angle of an equilateral pentagon’s vertex is $\\frac{3\\pi}{5}$ .

单词	Radian
释义	radian The radian is a of angle used in the higher mathematics. The magnitude of an angle $\\alpha$ is one radian, if the arc corresponding the angle $\\alpha$ as a central angle of a circle is equally long as the radius of the circle. Thus, a radian is equal to $\\frac{180}{\\pi}$ , minutes and seconds approximately $57^{\\mathrm{o}}\\,17^{\\prime}\\,44.80625^{\\prime\\prime}.$ In degrees, a circle has 360 degrees, while in radians a circle has $2\\pi$ radians. In fact, many angles of equilateral polygons are equal to a multiple of $\\pi$ divided by some integer: for example, the interior angle of an equilateral triangle’s vertex is $\\frac{\\pi}{3}$ , while the interior angle of an equilateral pentagon’s vertex is $\\frac{3\\pi}{5}$ .
随便看	positive semidefinite PositiveSemidefinite1 PositivityInOrderedRing positivity in ordered ring PossibleOrdersOfEllipticFunctions possible orders of elliptic functions PostCorrespondenceProblem Post correspondence problem PostSystem Post system PotentialOfHollowBall potential of hollow ball PotentialTheory potential theory PouletNumber Poulet number PowerassociativeAlgebra power-associative algebra PowerBasisOvermathbbZ power basis over ℤ PowerFunction power function PowerMean power mean PowerOfAnInteger