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phamvantrinh765
2 năm trước
a, Cho biết sin a = 1/3. Tính cos a, tan a, cot a. b, Cho biết cos a = 0,8. Tính sin a, tan a, cot a. c, Cho biết tan a = 2. Tính sin a, cos a, cot a Giải giúp mk với ạ! thanks
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