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Question 4
Measures of the two angles between hour and minute hands of a clock at 9 0' clock are 
a) 60, 300 
b) 270, 90 
c) 75, 285
d) 30, 330


Solution

A reflex angle measure is more than 180 but less than 360. For any acute angle θ, its reflex angle is (360θ).

The positions of an hour and minute hands of a clock at 9 0' clock are represented in the given figure.

Clearly, 1 = 90
and 2 = Reflex of 1 = 36090 = 270
 

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