1)sin(2) 60o + cos(2) 60o
2)sin(2) 120o - cos(2) 120o
3)sin137o cos107o - cos137o sin107o - cos(2) 15o + sin(2) 15o

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1)sin(2) 60o + cos(2) 60o 2)sin(2) 120o - cos(2) 120o 3)sin137o cos107o - cos137o sin107o - cos(2) 15o + sin(2) 15o

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1)sin(2) 60o + cos(2) 60o
2)sin(2) 120o - cos(2) 120o
3)sin137o cos107o - cos137o sin107o - cos(2) 15o + sin(2) 15o