Posted by chinnu on Tuesday, July 19, 2011 at 2:10pm.
cosec(theta)=1/sin(theta)
sin(45°)= sqrt(2)/2= 1/sqrt(2)
cosec(45°)=1/[1/sqrt(2)]
cosec(45°)=sqrt(2)
cosec^2(45°)=[sqrt(2)]^2= 2
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