Question
Mon September 28, 2009 By: Khushal Gupta

Trigonometry.

Expert Reply
Tue September 29, 2009

cos 1° .  cos 2° .  cos 3° ................... cos 180°  =cos 1° .  cos 2° .  cos 3° ...........cos 90o....... cos 180°

Now cos 90o. =0  so the product will be zero.

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