prove that cos6cos42cos66cos78=1/16

Asked by rohitkumarh94 | 24th Feb, 2011, 04:50: AM

Expert Answer:

Dear student,
 
cos6o. cos42o. cos66o. cos78o
=cos6o. cos66o. cos42o. cos78o
 
We hope that clarifies your query.
 
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Answered by  | 24th Feb, 2011, 08:12: PM

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