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If A,B,C,D =2Pi then prove that tanA +tanB+tanC +tanD = tanAtanBtanCtanD (cotA+cotB+cot+cotB) If A,B,C,D =2Pi then prove that tanA +tanB+tanC+tanD = tanAtanBtanCtanD (cotA+cotB+cot+cotB)
please re-check the question i guess it should beA+B+C+D= 2pie
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