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Mathematics, 05.02.2022 04:50 KeiraDawn

Find cos 2∅ if ∅ is in the first quadrant and tan∅ = 40/9.
cos2∅ = ?

Find cos 2∅ if ∅ is in the first quadrant and tan∅ = 40/9.cos2∅ = ?

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Find cos 2∅ if ∅ is in the first quadrant and tan∅ = 40/9.
cos2∅ = ?
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