1.

If 3theta is not an odd multiple of pi/2 then prove that tanthetatan(60^(@)+theta) tan(60^(@)-theta)=tan3theta and deduce that tan6^(@) tan42^(@) tan66^(@) tan78^(@)=1.

Answer»


Answer :`rArr TAN 6^(0)tan 42^(0) tan 66^(0)tan 78^(0)=1 `


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