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Question

The value of cos100.cos200.cos300........cos800.......cos9000.....cos17900 is ?

A
12
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B
0
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C
1
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D
None of these
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Solution

The correct option is B 0

cos100.cos200.cos300........cos800.......cos9000.....cos17900

We know cos900=0

So the product is

cos100.cos200.cos300.......cos800.......cos900.....cos17900

=0


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