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If x = cos1°cos2°cos3° … cos89° and y = cos2°cos6° cos10° … cos86°, then what is the integer nearest to 2/7log2(y/x)?

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If x = cos1°cos2°cos3° … cos89° and y = cos2°cos6° cos10° … cos86°, then what is the integer nearest to 2/7log2(y/x)?

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x = cos1° cos2° cos3° ... cos89°

= cos1° sin1° cos2° sin2° ... cos44° sin44° cos45°

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