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The value of the expression cos1°. cos2°. cos3° … cos 179° = (A) -1  (B) 0  (C) 1/ √2 (D) 1

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The value of the expression cos1°. cos2°. cos3° … cos 179° =

(A) -1 

(B) 0 

(C) 1/ √2

(D) 1

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1 Answer

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Best answer

Correct option is : (B) 0

cos 1° cos 2° cos 3° … cos 179° 

= cos 1° cos 2° cos 3° … cos 90°… cos 179° 

= 0 …[∵ cos 90° = 0]

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