1.

Prove This

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\bold{\frac{tanQ}{(1 - cotQ)} + \frac{cotQ}{(1 - tanQ)} = (1 + secQcosecQ)}

LHS,

\bold{\frac{sinQ}{cosQ} /\frac{1-cosQ} {sinQ} +\frac{cosQ}{sinQ} /\frac{1-sinQ} {cosQ}}

\bold{\frac{SinQ}{cosQ} /\frac{sinQ-cosQ} {sinQ} +\frac{cosQ}{sinQ} /\frac{cosQ-sinQ}{cosQ}}

\bold{\frac{sin^2Q}{cosQ(sinQ-cosQ)} +\frac{cos^2Q}{sinQ(cosQ-sinQ)}}

\bold{\frac{sin^3Q+cos^3Q} {sinQcosQ(sinQ-cosQ)}}

\bold{\frac{(sinQ-cosQ)(sin^2Q+cos^2Q+sinQcosQ)}{sinQcosQ(sinQ-cosQ)}}

\bold{\frac{sin^2Q+cos^2Q+sinQcosQ} {sinQcosQ}}

\bold{\frac{1+sinQcosQ}{sinQcosQ}}

\bold{\frac{1}{sinQcosQ}+1}

\bold{cosecQsecQ+1}. RHS

\bold{LHS=RHS}

\bold{Hence proved}



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