1.

if sin a, sin b, sin c are in A.P.and cos a, cos b, cos c are in G.P., then find the value of ((cos^2)a + (cos^2)b – 4 cosa cosb) / (1- sina sinb)

Answer» if sin a, sin b, sin c are in A.P.and cos a, cos b, cos c are in G.P., then find the value of ((cos^2)a + (cos^2)b – 4 cosa cosb) / (1- sina sinb)


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