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sin(5-2a) = cos(5a - 5)
cos[90-(5-2a) = cos(5a-5)
85+ 2a = 5a - 5
3a = 90
a = 30
cos[90-(5-2a) = cos(5a-5)
85+ 2a = 5a - 5
3a = 90
a = 30
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