Triangle(a,b,c); a^2, b^2, c^2 and cot of interior angles are in A.P.

 

Let   (a, \; b, \; c)   be the sides of triangle such that   a^2, \; b^2, \; c^2   are in A.P.

a^2 \; + \; c^2 \; = \; 2 \, b^2

Prove that the cotangent of the interior angles are also in A.P.

 
 

 
 
 
 
 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

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About benvitalis

math grad - Interest: Number theory
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