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Grade: 11 

                        
if A,B,C be the angles of a triangle and cos theta(sinB+sinC)=sinA, then prove that tan^2(theta/2)=tan(B/2)tan(C/2)
2 years ago

Answers : (1)

Saurabh Koranglekar
askIITians Faculty
8407 Points 
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one year ago
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