tanx*sinx*cot^2xsecx/tanx*sinx*cot^2xsecx/tanx*sinx*cot^2xsecx.....upto infinity
tanx*sinx*cot^2xsecx/tanx*sinx*cot^2xsecx/tanx*sinx*cot^2xsecx.....upto infinity
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