Prove that : \[\begin{aligned}(\sin \mathrm{A}+\cos \mathrm{A})(\sec \mathrm{A}+\operatorname{co...
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0Prove that :
\[\begin{aligned}(\sin \mathrm{A}+\cos \mathrm{A})(\sec \mathrm{A}+\operatorname{cosec} \mathrm{A}) \\&=2+\sec \mathrm{A} \operatorname{cosec} \mathrm{A}\end{aligned}\]
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