Soln:
If A, B, C and D are angles of a quadrilateral and sin(A/2).sin(B/2).Sin(C/2).sin(D/2) = 1/4, prove that A = B = C = D = pi/2
Soln:
If A, B, C and D are angles of a quadrilateral and sin(A/2).sin(B/2).Sin(C/2).sin(D/2) = 1/4, prove that A = B = C = D = pi/2
S.E.E. Solution
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