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Question

cos 1 × cos 2 × cos 3 ×……..× cos 180 is equal to ____.


A

1

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B

0

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C

12

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D

-1

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Solution

The correct option is B

0


We know that, cos 90 = 0
The given expression
cos 1 × cos 2 × cos 3 ×....× cos 90 ×……..× cos 180 reduces to zero as it contains cos 90 which is equal to 0.


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