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For A= in (0,pi/4),"if"(1+(cos3A)/(cosA)...

For `A= in (0,pi/4),"if"(1+(cos3A)/(cosA))+(1+(cos6A)/(cos2A))+(1+(cos9A)/(cos3A))+(1+(cos12 A)/(cos4A))=0,`then find the value of (csc A - scc 2A).

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