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If A + B = 225^(@),"show that",(cotA)/(1...

If `A + B = 225^(@),"show that",(cotA)/(1 + cot A).(cot B)/(1 + cot B) =1/2.`

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`(cot A)/(1 + cotA). (cot B)/(1 + cot B) = 1/2`
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