Mathematics, 27.10.2020 01:00, lucyamine0

Angle x is in the first quadrant and angle y is in the second quadrant, such that Cosx = 12/13 and Siny = 7/25. Determine an exact value for Cos(x+y).

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Angle x is in the first quadrant and angle y is in the second quadrant, such that Cosx = 12/13 and S...