SinA=cosA,find the value of (tanA+1)/(tanA-1)
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sinA=cosA
sinA/cosA=1
tanA=1
(tanA+1)/(tanA-1)
(1+1)/(1-1)=2/0 which is undefined
sinA/cosA=1
tanA=1
(tanA+1)/(tanA-1)
(1+1)/(1-1)=2/0 which is undefined
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