If theta(i)in[0,pi//6],i=1,2,3,4,5,and s...

If `theta_(i)in[0,pi//6],i=1,2,3,4,5,and sintheta_(1)z^(4)+sin theta_(2)z^(3)+sintheta_(3)z^(2)+sintheta_(4)z+sintheta_(5)=2,` show that `(3)/(4)lt|Z|lt1.`

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