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Mathematics, 08.03.2021 07:30 dejanaej6

Given cosα = −3/5, 180 < α < 270, and sinβ = 12/13, 90 < β < 180 find exact value of cos(a-b)

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Given cosα = −3/5, 180 < α < 270, and sinβ = 12/13, 90 < β < 180 find exact value of co...

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