यदि tan^(-1)a+tan^(-1)b+tan^(-1)c=(pi)/(...

यदि `tan^(-1)a+tan^(-1)b+tan^(-1)c=(pi)/(2)` है तो सिद्ध कीजिए कि `ab+bc+ca=1`

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यदि tan^(-1)a+tan^(-1)b+tan^(-1)c=(pi)/(2) है तो सिद्ध कीजिए कि ab+bc+...
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