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Question: Write the radian measure of an angle with 9 clockwise rotations in standard position.


A ) 18π
B ) - 18π
C ) - 9π
D ) 9π

Steps to derive

1 1 clockwise rotation is - 2π radians.

2 9 × (- 2π) = - 18π
 [In clockwise direction the measure is negative.]



Hence the right answer is Option B

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