How is it possible TAN 90×COT 90=1 Because tan90=1/0 & cot90=O so how

1.	How is it possible TAN 90×COT 90=1 Because tan90=1/0 & cot90=O so how 1/0 ×0 =1
Answer» Tan90 =1/cot 90Therefore 1/cot 90×cot 90=1

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