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Content text ÔN TẬP CHƯƠNG 3_Giá trị lượng giác_Chỉ có đề.pdf


.......................................................................................................................................................................... .......................................................................................................................................................................... .......................................................................................................................................................................... .......................................................................................................................................................................... .......................................................................................................................................................................... Câu 5: Hai góc nhọn  và  phụ nhau, hệ thức nào sau đây là sai? A. sin  cos  . B. tan  cot  . C. 1 cot cot    . D. cos  sin  . Lời giải .......................................................................................................................................................................... .......................................................................................................................................................................... .......................................................................................................................................................................... .......................................................................................................................................................................... .......................................................................................................................................................................... Câu 6: Cho 1 cos 2 x  . Tính biểu thức 2 2 P  3sin x  4 cos x A. 13 4 . B. 7 4 . C. 11 4 . D. 15 4 . Lời giải .......................................................................................................................................................................... .......................................................................................................................................................................... .......................................................................................................................................................................... .......................................................................................................................................................................... .......................................................................................................................................................................... .......................................................................................................................................................................... .......................................................................................................................................................................... .......................................................................................................................................................................... .......................................................................................................................................................................... .......................................................................................................................................................................... .......................................................................................................................................................................... .......................................................................................................................................................................... Câu 7: Biết 1 cos 3   . Giá trị đúng của biểu thức 2 2 P  sin   3cos  là: A. 1 3 . B. 10 9 . C. 11 9 . D. 4 3 . Lời giải .......................................................................................................................................................................... ..........................................................................................................................................................................
.......................................................................................................................................................................... .......................................................................................................................................................................... .......................................................................................................................................................................... .......................................................................................................................................................................... .......................................................................................................................................................................... .......................................................................................................................................................................... .......................................................................................................................................................................... .......................................................................................................................................................................... .......................................................................................................................................................................... .......................................................................................................................................................................... .......................................................................................................................................................................... Câu 8: Cho biết 2 cos 3    và 0 2    . Tính tan ? A. 5 4 . B. 5 2  . C. 5 2 . D. 5 2  . Lời giải .......................................................................................................................................................................... .......................................................................................................................................................................... .......................................................................................................................................................................... .......................................................................................................................................................................... .......................................................................................................................................................................... .......................................................................................................................................................................... .......................................................................................................................................................................... .......................................................................................................................................................................... .......................................................................................................................................................................... .......................................................................................................................................................................... Câu 9: Cho  là góc tù và 5 sin 13   . Giá trị của biểu thức 3sin  2 cos là A. 3. B. 9 13  . C. 3 . D. 9 13 . Lời giải .......................................................................................................................................................................... .......................................................................................................................................................................... .......................................................................................................................................................................... .......................................................................................................................................................................... .......................................................................................................................................................................... ..........................................................................................................................................................................

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