If m^(2) cos.(2pi)/(15)cos. (4pi)/(15) c...

If `m^(2) cos.(2pi)/(15)cos. (4pi)/(15) cos. (8 pi)/(15) cos. (14pi)/(15)=n^(2)`, then find the value of `(m^(2)-n^(2))/(n^(2))`.

Text Solution

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The correct Answer is:

15

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cos ""(2pi)/( 15) cos ""(4pi)/(15) cos ""(8pi)/(15) cos ""(16pi)/(15)=

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