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[5] cos(a + b) given cos a VĪT with a co 6 and 2 Зл CSC B = -2 with Be 21 2

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Grones Given Cus &- $ 8 & in ist Quadrant Corp = -2 and B is a to Quadrant Ccesine & see cakes only the to... Simp = -4/ 6 5Grones Given Cus &- $ 8 & in ist Quadrant Corp = -2 and B is a to Quadrant Ccesine & see cakes only the to... Simp = -4/ 6 5

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