Cos76⁰Cos16⁰ + Sin76⁰Sin16⁰ = Cos (76⁰ - 16⁰) = Cos60⁰ = 0,5
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Cos76⁰Cos16⁰ + Sin76⁰Sin16⁰ = Cos (76⁰ - 16⁰) = Cos60⁰ = 0,5