Convert radian to second
Please provide values below to convert radian [rad] to second ["], or Convert second to radian.
How to Convert Radian to Second
1 rad = 206264.789745617 "
Example: convert 15 rad to ":
15 rad = 15 × 206264.789745617 " = 3093971.84618425 "
Radian to Second Conversion Table
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Radian
A radian is the standard unit of angular measure in mathematics, defined as the angle subtended at the center of a circle by an arc equal in length to the circle's radius.
History/Origin
The radian was introduced in the 19th century as a natural unit of angular measurement based on the properties of circles, providing a more mathematically convenient measure than degrees.
Current Use
Radians are widely used in mathematics, physics, and engineering for calculations involving angles, trigonometry, and periodic functions, serving as the standard angular unit in many scientific contexts.
Second
The second is a unit of time representing the duration of 9,192,631,770 periods of radiation corresponding to the transition between two hyperfine levels of the ground state of the cesium-133 atom.
History/Origin
The second was originally defined in 1956 based on Earth's rotation but was later redefined in 1967 based on the vibrations of the cesium-133 atom, making it a precise atomic time standard.
Current Use
The second is used universally in science, technology, and daily life to measure time intervals, coordinate universal time (UTC), and in various applications requiring precise timekeeping.