# The value of cos 1° cos 2° cos 3°…… cos 180° isA. 1B. 0C. -1D. None of these

Given,

cos 1° cos 2° cos 3° ………………..cos 180°

cos 1° × cos 2° × cos 3° …… cos 89° × cos 90° × cos 91° ……….cos 180°

As we know from the table,

cos 90° = 0

Therefore,

cos 1° × cos 2° × cos 3° …… cos 89° × 0 × cos 91° ……….cos 180°

= 0

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