Angle Measure: Introduction to Radians

$\rhd$ Introduction to radians (10:51)This video explains the definition and motivation for radians and the relationship between radians and degrees, including the identities by which we can convert between radians and degrees.
$\rhd$ Radians and degrees (7:12)Sal discusses the general approach to converting between radians and degrees and vice versa. Describes identities, then converts $30$ degrees to radians — including nice explanation of unit conversion. Also converts $45$ degrees to radians and $-\dfrac{\pi}{2}$ radians to degrees.
$\rhd$ Converting degrees to radians (7:01)This video shows how to convert the degree measures 150° and -45° to radians.
$\rhd$ Converting radians to degrees (3:19)
Converts $\pi$ and $-\dfrac{\pi}{3}$ radians to degrees.
$\star$ Converting from radians to degrees and visa versa
Assorted example problems
$\rhd$ Radians and Quadrants (3:51)
This video show how to find the quadrant in which a ray formed by rotation of $\theta$ radians lies. Examples: $\dfrac{3\pi}{5}$ , $\dfrac{2\pi}{7}$ , $3$ radians.

The OpenLab at City Tech:A place to learn, work, and share

The OpenLab is an open-source, digital platform designed to support teaching and learning at City Tech (New York City College of Technology), and to promote student and faculty engagement in the intellectual and social life of the college community.

The OpenLab at City Tech:A place to learn, work, and share

The OpenLab at City Tech:A place to learn, work, and share

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The OpenLab at City Tech:A place to learn, work, and share

Support

Accessibility

Copyright

Creative Commons