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question mark

The value of cos10 cos20 cos30 ……….cos1790 is equal to

a) 1/(2)1/2

b) -1/(2)1/2

c) 0

d) 2

pranshu aggarwal , 14 Years ago
Grade
anser 1 Answers
vikas askiitian expert

Last Activity: 14 Years ago

cos1cos2cos3cos4....................cos90 .........cos179

cos90 = 0 so product of this series will become 0...

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