Sách Toán – Học Toán – Đề Thi Toán https://booktoan.com Học toán, Đề thi toán, Sách giáo khoa Toán, trắc nghiệm Toán online Sun, 04 Oct 2026 01:45:55 +0000 vi hourly 1 https://wordpress.org/?v=7.1.3 Ứng dụng phương trình lượng giác: Tìm thời điểm mực nước trong bến cảng đạt $2{,}5\text{ m}$ theo hàm $h(t) = 3 + 2\sin\left(\frac{\pi}{6}t + \frac{\pi}{4}\right)$ https://booktoan.com/ung-dung-phuong-trinh-luong-giac-tim-thoi-diem-muc-nuoc-trong-ben-cang-dat-25text-m-theo-ham-ht-3-2sinleftfracpi6t-fracpi4right.html https://booktoan.com/ung-dung-phuong-trinh-luong-giac-tim-thoi-diem-muc-nuoc-trong-ben-cang-dat-25text-m-theo-ham-ht-3-2sinleftfracpi6t-fracpi4right.html#respond Sun, 04 Oct 2026 01:45:55 +0000 https://booktoan.com/ung-dung-phuong-trinh-luong-giac-tim-thoi-diem-muc-nuoc-trong-ben-cang-dat-25text-m-theo-ham-ht-3-2sinleftfracpi6t-fracpi4right.html https://booktoan.com/ung-dung-phuong-trinh-luong-giac-tim-thoi-diem-muc-nuoc-trong-ben-cang-dat-25text-m-theo-ham-ht-3-2sinleftfracpi6t-fracpi4right.html/feed 0 Ứng dụng phương trình lượng giác: Tính thời điểm mức nước thủy triều đạt độ sâu $h = 3$ mét tại một cảng biển https://booktoan.com/ung-dung-phuong-trinh-luong-giac-tinh-thoi-diem-muc-nuoc-thuy-trieu-dat-do-sau-h-3-met-tai-mot-cang-bien.html https://booktoan.com/ung-dung-phuong-trinh-luong-giac-tinh-thoi-diem-muc-nuoc-thuy-trieu-dat-do-sau-h-3-met-tai-mot-cang-bien.html#respond Sun, 04 Oct 2026 01:42:58 +0000 https://booktoan.com/ung-dung-phuong-trinh-luong-giac-tinh-thoi-diem-muc-nuoc-thuy-trieu-dat-do-sau-h-3-met-tai-mot-cang-bien.html https://booktoan.com/ung-dung-phuong-trinh-luong-giac-tinh-thoi-diem-muc-nuoc-thuy-trieu-dat-do-sau-h-3-met-tai-mot-cang-bien.html/feed 0 Ứng dụng phương trình lượng giác: Tìm thời điểm công suất tiêu thụ điện đạt $110\text{ kW}$ trong ngày $P(t) = 100 + 10\sin\left(\frac{\pi}{12}t\right)$ https://booktoan.com/ung-dung-phuong-trinh-luong-giac-tim-thoi-diem-cong-suat-tieu-thu-dien-dat-110text-kw-trong-ngay-pt-100-10sinleftfracpi12tright.html https://booktoan.com/ung-dung-phuong-trinh-luong-giac-tim-thoi-diem-cong-suat-tieu-thu-dien-dat-110text-kw-trong-ngay-pt-100-10sinleftfracpi12tright.html#respond Sun, 04 Oct 2026 01:39:54 +0000 https://booktoan.com/ung-dung-phuong-trinh-luong-giac-tim-thoi-diem-cong-suat-tieu-thu-dien-dat-110text-kw-trong-ngay-pt-100-10sinleftfracpi12tright.html https://booktoan.com/ung-dung-phuong-trinh-luong-giac-tim-thoi-diem-cong-suat-tieu-thu-dien-dat-110text-kw-trong-ngay-pt-100-10sinleftfracpi12tright.html/feed 0 Giải phương trình lượng giác $\sin(2x – \frac{\pi}{4}) = \sin(x + \frac{\pi}{3})$ https://booktoan.com/giai-phuong-trinh-luong-giac-sin2x-fracpi4-sinx-fracpi3.html https://booktoan.com/giai-phuong-trinh-luong-giac-sin2x-fracpi4-sinx-fracpi3.html#respond Sun, 04 Oct 2026 01:35:53 +0000 https://booktoan.com/giai-phuong-trinh-luong-giac-sin2x-fracpi4-sinx-fracpi3.html https://booktoan.com/giai-phuong-trinh-luong-giac-sin2x-fracpi4-sinx-fracpi3.html/feed 0 Giải phương trình lượng giác $\sin(2x + \frac{\pi}{4}) = \sin(x – \frac{\pi}{6})$ và các mệnh đề liên quan https://booktoan.com/giai-phuong-trinh-luong-giac-sin2x-fracpi4-sinx-fracpi6-va-cac-menh-de-lien-quan.html https://booktoan.com/giai-phuong-trinh-luong-giac-sin2x-fracpi4-sinx-fracpi6-va-cac-menh-de-lien-quan.html#respond Sun, 04 Oct 2026 01:33:55 +0000 https://booktoan.com/giai-phuong-trinh-luong-giac-sin2x-fracpi4-sinx-fracpi6-va-cac-menh-de-lien-quan.html https://booktoan.com/giai-phuong-trinh-luong-giac-sin2x-fracpi4-sinx-fracpi6-va-cac-menh-de-lien-quan.html/feed 0 Giải phương trình lượng giác $\sin(2x + \frac{\pi}{3}) = \frac{1}{2}$ trong khoảng $(0; \pi)$ https://booktoan.com/giai-phuong-trinh-luong-giac-sin2x-fracpi3-frac12-trong-khoang-0-pi.html https://booktoan.com/giai-phuong-trinh-luong-giac-sin2x-fracpi3-frac12-trong-khoang-0-pi.html#respond Sun, 04 Oct 2026 01:25:02 +0000 https://booktoan.com/giai-phuong-trinh-luong-giac-sin2x-fracpi3-frac12-trong-khoang-0-pi.html https://booktoan.com/giai-phuong-trinh-luong-giac-sin2x-fracpi3-frac12-trong-khoang-0-pi.html/feed 0 Giải phương trình lượng giác $\cos 2x + 3\sin x – 2 = 0$ https://booktoan.com/giai-phuong-trinh-luong-giac-cos-2x-3sin-x-2-0.html https://booktoan.com/giai-phuong-trinh-luong-giac-cos-2x-3sin-x-2-0.html#respond Sun, 04 Oct 2026 01:18:52 +0000 https://booktoan.com/giai-phuong-trinh-luong-giac-cos-2x-3sin-x-2-0.html https://booktoan.com/giai-phuong-trinh-luong-giac-cos-2x-3sin-x-2-0.html/feed 0 Tìm chu kì tuần hoàn của hàm số $y = \tan\left(2x + \frac{\pi}{4}\right)$ https://booktoan.com/tim-chu-ki-tuan-hoan-cua-ham-so-y-tanleft2x-fracpi4right.html https://booktoan.com/tim-chu-ki-tuan-hoan-cua-ham-so-y-tanleft2x-fracpi4right.html#respond Tue, 22 Sep 2026 03:26:30 +0000 https://booktoan.com/tim-chu-ki-tuan-hoan-cua-ham-so-y-tanleft2x-fracpi4right.html https://booktoan.com/tim-chu-ki-tuan-hoan-cua-ham-so-y-tanleft2x-fracpi4right.html/feed 0 Tìm tập xác định của hàm số $y = \frac{\tan 2x}{\cos x – \sin x}$ https://booktoan.com/tim-tap-xac-dinh-cua-ham-so-y-fractan-2xcos-x-sin-x.html https://booktoan.com/tim-tap-xac-dinh-cua-ham-so-y-fractan-2xcos-x-sin-x.html#respond Mon, 21 Sep 2026 13:10:54 +0000 https://booktoan.com/tim-tap-xac-dinh-cua-ham-so-y-fractan-2xcos-x-sin-x.html https://booktoan.com/tim-tap-xac-dinh-cua-ham-so-y-fractan-2xcos-x-sin-x.html/feed 0 Tìm tập xác định của hàm số $y = \frac{\sqrt{3} – \tan x}{\sin 2x + \cos x}$ https://booktoan.com/tim-tap-xac-dinh-cua-ham-so-y-fracsqrt3-tan-xsin-2x-cos-x.html https://booktoan.com/tim-tap-xac-dinh-cua-ham-so-y-fracsqrt3-tan-xsin-2x-cos-x.html#respond Mon, 21 Sep 2026 13:00:58 +0000 https://booktoan.com/tim-tap-xac-dinh-cua-ham-so-y-fracsqrt3-tan-xsin-2x-cos-x.html https://booktoan.com/tim-tap-xac-dinh-cua-ham-so-y-fracsqrt3-tan-xsin-2x-cos-x.html/feed 0