Solve cos1°.cos2°.cos3°......... cos180°

Er Chandra Bhushan
0
Soln:-Given,
 =cos1°.cos2°.cos3°......... cos180°

=cos1°.cos2°.cos3°...cos88°.cos89°.
cos90°..... cos180°
                            *cos90°=0
So,cos1°.cos2°.cos3°......... cos180° = 0 Ans.... 
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