radians
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Radians and degrees
Angles can be measured in either radians or degrees where radians. If you know that radians, you can easily convert between the two.
To convert from degrees to radians,
So 30 converts to radians as follows:
= or radians
Try this!
Convert 125 into radians.
= or radians
To convert from radians to degrees, . If the angle contains , simply replace with 180 as shown below.
To convert radians into degrees
=
Try this!
Convert a value of 2 radians into degrees.
(to 1 decimal place)
Equations and radians
To solve trigonometrical equations involving radian measure, you should proceed in the same way as for degrees. Use the diagram below to help you apply the necessary conditions...