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LESSON 1:
Radians & Degrees
Angle
Measure:
Degree measure:
Radian measure: One
radian is the measure
of an angle at the centre of a circle whose arc length [a] is equal to
the radius [r].
The
radian measure of an angle is given by the following formula:
Relation between Radians and
degrees:
Example 1: Conversions from radian
measure to degree measure
Solution:
)
Example 2: Conversions from degree
measure to radian measure
Solution:
Example 3:
Solutions:
Example 4: Angular Velocity
An
electric motor turns at 2500 rpm’s (rev’s per minute). Express this angular velocity in radians per
second to the nearest hundredth.
Solution:
