[" If "],[[" Q."12,1+cos ec(pi)/(4)+cose...

[" If "],[[" Q."12,1+cos ec(pi)/(4)+cosec(pi)/(8)+cos ec(pi)/(16)=cot theta,theta in(0,pi)],[," then "(pi)/(4 theta)=]],[" 1) "bigcirc" 8"],[" 2) "bigcirc12],[" 3) "bigcirc24],[" 4) "bigcirc4]

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