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Find the value of cos1⁰, cos 2⁰,cos 3⁰,cos4⁰ .......cos180⁰

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Given : cos 1° cos 2° cos 3° ....... cos 179° cos 180°.

cos 1° cos 2° cos 3° ....... cos 179° cos 180°.

= cos 1° cos 2° cos 3° .......cos 89° cos 90° cos 91°……..  cos 179° cos 180°.

= cos 1° cos 2° cos 3° ...... cos 89° (0) cos 91°……..  cos 179° cos 180°.

[cos 90° = 0]

= 0

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