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OpenStudy (rogue):
Anyone up for a challenge? Let ABCD be a convex quadrilateral with AB = 2, BC = 3, CD = 4, DA = 5 and area(ACD) – area(ABC) = 6. Determine cos(Ɵ – ø), where measure of angle ABC = Ɵ and measure of angle CDA = ø.
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OpenStudy (anonymous):
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