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Question

If a=sec10c, then

A
a>0
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B
a<0
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C
a=0
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D
none of these
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Solution

The correct option is B a<0
Given : a=sec10c
We know that 1c57
10c570
a=sec10csec570sec210
210 lies in 3rd quadrant, so
sec10c<0

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