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slim102471
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To calculate measure of an arc

To convert degrees to radians, multiply degrees by

To convert radians to degrees, multiply radians by

The length, s, of an arc intercepted by a central angle with radian measure θ in a circle of radius, r, is
rθ





















PowerReducing Formula:
=

PowerReducing Formula:

PowerReducing Formula:

HalfAngle Formula:

HalfAngle Formula:

HalfAngle Formula:



i and j unit vectors
i = x axis
j = y axis


