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(a) If A+B+C 180 prove that Sin(B+C-A)+Sin(C+A-B)+Sin(A+B-C)-Sin2A+Sin2B+Sin2C (b) Prove that Cos(x+y)Cos(x-y)-Cos'x-Sin'y-Cos'y-Sin'x
(a) If A+B+C 180 prove that Sin(B+C-A)+Sin(C+A-B)+Sin(A+B-C)-Sin2A+Sin2B+Sin2C (b) Prove that Cos(x+y)Cos(x-y)-Cos'x-Sin'y-Cos'y-Sin'x
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Global Marketing management
Authors: Masaaki Kotabe, Kristiaan Helsen
5th edition
470505745, 978-0470505748
