Make sure your angles are in units of radians (not degrees), where 2Ï€ radians = 360 degrees. But after that you will get the ...
The radius of a circle or a sphere is the distance between the center and the edge. The radius can be used to calculate a circle's diameter, area and circumference. Likewise, a sphere's volume is ...
An international team of scientists working with the Event Horizon Telescope project have been able to measure the radius of a black hole for the first time. It was in 1781 that astronomer Charles ...