1.

If A,B,C are the angles of a triangle, then the absolute value of ∣∣∣∣∣e−2iAeiCeiBeiCe−2iBeiAeiBeiAe−2iC∣∣∣∣∣ is

Answer» If A,B,C are the angles of a triangle, then the absolute value of ∣∣
∣
∣
∣
e−2iAeiCeiBeiCe−2iBeiAeiBeiAe−2iC∣∣
∣
∣
∣
is


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