All angles are 60 degree Cos60 = 1/2 = 1/2 + 1/2 + 1/2 = 3/2 So triangle is an equilateral triangle
If in a triangle ABC: Cos A + Cos B + Cos C = 3/2 then what is so special about this triangle?
If P=Sin A.Sin B, Q= Sin C.Cos A, R = Sin A.Cos B and S=Cos A.Cos C then 5(P^2+Q^2+R^2+S^2) = ??
If Sin A + Cos A = sqrt(2) Sin (90 - A) then Cot A = ??