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The expression \({\tan A\over{1-cotA}}+{cot A\over{1-tan A}}\)   can be written as 

A) sinAcosA+1

B)secAcosecA+1

C)tanA+cotA 

D)secA+cosecA

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The correct answer is b) secA cosecA+1  

tana/1-cota+cota/1-tana

 

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