Mathematics Resources for Class 11
Sunday, September 8, 2013
Prove that 2 Cos (Pi/13). Cos (9Pi/13) + Cos (5Pi/13) + Cos (3Pi/13)= 0
Prove that 2 Cos (
Pi
/13). Cos (9
Pi
/13) + Cos (5
Pi
/13) + Cos (3
Pi
/13)= 0
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July 26, 2017 at 1:50 AM
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