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cos1^@ . cos2^@ . cos3^@.........cos179^...

` cos1^@ . cos2^@ . cos3^@.........cos179^@` is equal to :

A

0

B

1

C

`-(1)/(2)`

D

`-1`

Text Solution

Verified by Experts

The correct Answer is:
A
`cos 1^(@).cos2^(@).cos3^(@)...`
`cos90^(@)cos91^(@)....cos179^(@)`
`=0[:'cos 90^(@)=0]`
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