Sách Toán – Học Toán – Đề Thi Toán https://booktoan.com Học toán, Đề thi toán, Sách giáo khoa Toán, trắc nghiệm Toán online Tue, 22 Sep 2026 03:26:30 +0000 vi hourly 1 https://wordpress.org/?v=7.1.2 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 Khẳng định nào sau đây đúng về tính chẵn, lẻ của hàm số $y = f(x) = \frac{\sin 3x}{2 + \cos x}$? https://booktoan.com/khang-dinh-nao-sau-day-dung-ve-tinh-chan-le-cua-ham-so-y-fx-fracsin-3x2-cos-x.html https://booktoan.com/khang-dinh-nao-sau-day-dung-ve-tinh-chan-le-cua-ham-so-y-fx-fracsin-3x2-cos-x.html#respond Mon, 21 Sep 2026 14:00:45 +0000 https://booktoan.com/khang-dinh-nao-sau-day-dung-ve-tinh-chan-le-cua-ham-so-y-fx-fracsin-3x2-cos-x.html https://booktoan.com/khang-dinh-nao-sau-day-dung-ve-tinh-chan-le-cua-ham-so-y-fx-fracsin-3x2-cos-x.html/feed 0 Cho $\sin \alpha = \frac{3}{5}$ với $0 < \alpha < \frac{\pi}{2}$ và $\cos \beta = -\frac{5}{13}$ với $\frac{\pi}{2} < \beta < \pi$. Tính giá trị của biểu thức $P = \sin(\alpha + \beta) + \cos(\alpha - \beta)$ https://booktoan.com/cho-sin-alpha-frac35-voi-0-alpha-fracpi2-va-cos-beta-frac513-voi-fracpi2-beta-pi-tinh-gia-tri-cua-bieu-thuc-p-sinalpha-beta.html https://booktoan.com/cho-sin-alpha-frac35-voi-0-alpha-fracpi2-va-cos-beta-frac513-voi-fracpi2-beta-pi-tinh-gia-tri-cua-bieu-thuc-p-sinalpha-beta.html#respond Wed, 16 Sep 2026 00:27:55 +0000 https://booktoan.com/cho-sin-alpha-frac35-voi-0-alpha-fracpi2-va-cos-beta-frac513-voi-fracpi2-beta-pi-tinh-gia-tri-cua-bieu-thuc-p-sinalpha-beta.html https://booktoan.com/cho-sin-alpha-frac35-voi-0-alpha-fracpi2-va-cos-beta-frac513-voi-fracpi2-beta-pi-tinh-gia-tri-cua-bieu-thuc-p-sinalpha-beta.html/feed 0 Cho $\cos \alpha = -\frac{4}{5}$ với $\pi < \alpha < \frac{3\pi}{2}$. Tính các giá trị lượng giác còn lại của góc $\alpha$ và giá trị biểu thức $P = \frac{\sin \alpha + 2\cos \alpha}{\tan \alpha - \cot \alpha}$ https://booktoan.com/cho-cos-alpha-frac45-voi-pi-alpha-frac3pi2-tinh-cac-gia-tri-luong-giac-con-lai-cua-goc-alpha-va-gia-tri-bieu-thuc-p-fracsin-alpha-2cos-alphata.html https://booktoan.com/cho-cos-alpha-frac45-voi-pi-alpha-frac3pi2-tinh-cac-gia-tri-luong-giac-con-lai-cua-goc-alpha-va-gia-tri-bieu-thuc-p-fracsin-alpha-2cos-alphata.html#respond Thu, 10 Sep 2026 08:05:16 +0000 https://booktoan.com/cho-cos-alpha-frac45-voi-pi-alpha-frac3pi2-tinh-cac-gia-tri-luong-giac-con-lai-cua-goc-alpha-va-gia-tri-bieu-thuc-p-fracsin-alpha-2cos-alphata.html https://booktoan.com/cho-cos-alpha-frac45-voi-pi-alpha-frac3pi2-tinh-cac-gia-tri-luong-giac-con-lai-cua-goc-alpha-va-gia-tri-bieu-thuc-p-fracsin-alpha-2cos-alphata.html/feed 0 Dùng phương pháp quy nạp toán học chứng minh tính chất hình học https://booktoan.com/dung-phuong-phap-quy-nap-toan-hoc-chung-minh-tinh-chat-hinh-hoc.html https://booktoan.com/dung-phuong-phap-quy-nap-toan-hoc-chung-minh-tinh-chat-hinh-hoc.html#respond Sun, 26 Jan 2020 13:45:48 +0000 https://booktoan.com/?p=171880 https://booktoan.com/dung-phuong-phap-quy-nap-toan-hoc-chung-minh-tinh-chat-hinh-hoc.html/feed 0 Dùng phương pháp quy nạp toán học chứng minh bài toán chia hết https://booktoan.com/dung-phuong-phap-quy-nap-toan-hoc-chung-minh-bai-toan-chia-het.html https://booktoan.com/dung-phuong-phap-quy-nap-toan-hoc-chung-minh-bai-toan-chia-het.html#respond Sun, 26 Jan 2020 13:43:52 +0000 https://booktoan.com/?p=171878 https://booktoan.com/dung-phuong-phap-quy-nap-toan-hoc-chung-minh-bai-toan-chia-het.html/feed 0 Dùng phương pháp quy nạp toán học chứng minh bất đẳng thức https://booktoan.com/dung-phuong-phap-quy-nap-toan-hoc-chung-minh-bat-dang-thuc.html https://booktoan.com/dung-phuong-phap-quy-nap-toan-hoc-chung-minh-bat-dang-thuc.html#respond Sun, 26 Jan 2020 13:41:15 +0000 https://booktoan.com/?p=171876 https://booktoan.com/dung-phuong-phap-quy-nap-toan-hoc-chung-minh-bat-dang-thuc.html/feed 0 Dùng phương pháp quy nạp toán học chứng minh đẳng thức https://booktoan.com/dung-phuong-phap-quy-nap-toan-hoc-chung-minh-dang-thuc.html https://booktoan.com/dung-phuong-phap-quy-nap-toan-hoc-chung-minh-dang-thuc.html#respond Sun, 26 Jan 2020 13:37:30 +0000 https://booktoan.com/?p=171874 https://booktoan.com/dung-phuong-phap-quy-nap-toan-hoc-chung-minh-dang-thuc.html/feed 0 Lý thuyết Phương pháp quy nạp toán học https://booktoan.com/ly-thuyet-phuong-phap-quy-nap-toan-hoc.html https://booktoan.com/ly-thuyet-phuong-phap-quy-nap-toan-hoc.html#respond Sun, 26 Jan 2020 13:33:10 +0000 https://booktoan.com/?p=171872 https://booktoan.com/ly-thuyet-phuong-phap-quy-nap-toan-hoc.html/feed 0