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Grade 12th passTrigonometry

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

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9 Years agoGrade 12th pass
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Profile image of ANKIT ANAND
9 Years ago
Please help me. I m not able to sovle this question.....................,...............................