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prove that tan(x+a)tan(x+b)+ tan(x+b)tan(x+c)+ tan(x+c)tan(x+a)=1
In my opinion, i think the question is wrong or it lacks some important information. It cant be equal to 1 or there may be some condition on a,b or c.Suppose x=a=b=c=30 degrees..In this case it isnt equal to 1..Hence, it lacks some info.THanksBharat Bajajaskiitians FacultyIIT Delhi
ya theres something wrong..
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