Prove that...... cosπ/15.cos2π/15.cos3π/15.cos4π/15.cos5π/15.cos6π/15.cos7π/15=1/2∧7

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Prove that...... cosπ/15.cos2π/15.cos3π/15.cos4π/15.cos5π/15.cos6π/15.cos7π/15=1/2∧7

Prove that...... cosπ/15.cos2π/15.cos3π/15.cos4π/15.cos5π/15.cos6π/15.cos7π/15=1/2∧7

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Prove that...... cosπ/15.cos2π/15.cos3π/15.cos4π/15.cos5π/15.cos6π/15.cos7π/15=1/2∧7

Prove that...... cosπ/15.cos2π/15.cos3π/15.cos4π/15.cos5π/15.cos6π/15.cos7π/15=1/2∧7

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