Mathematics, 13.03.2021 06:00, gabegabemm1

For positive acute angles A and B, it is know that tan A= 8/15 and sin B= 11/61. Find the value of cos (a+b) in simplest form

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For positive acute angles A and B, it is know that tan A= 8/15 and sin B= 11/61. Find the value of c...