Hàm số lượng giác

Home Lớp 11 Toán lớp 11 - Sách kết nối tri thức Bài 3. Hàm số lượng giácBài tập nâng cao

{"common":{"save":0,"post_id":"7038","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"4766","post_id":"7038","mon_id":"1158924","chapter_id":"1159141","question":"T\u1eadp xác \u0111\u1ecbnh c\u1ee7a hàm s\u1ed1 $y=\\dfrac{\\sqrt{2-sinx}}{tanx}$<\/span> là<\/p>","options":["A.<\/strong> $D=R\\setminus \\bigg\\{\\dfrac{\\pi}{2}+k\\pi,k\\in Z\\bigg\\}$<\/span>","B.<\/strong> $D=R\\setminus \\bigg\\{k\\pi,k\\in Z\\bigg\\}$<\/span>","C.<\/strong> $D=R\\setminus \\bigg\\{k\\dfrac{\\pi}{2},k\\in Z\\bigg\\}$<\/span>","D.<\/strong> $D=R\\setminus \\bigg\\{k2\\pi,k\\in Z\\bigg\\}$<\/span>"],"correct":"3","level":"3","hint":"","answer":"\u0110i\u1ec1u ki\u1ec7n xác \u0111\u1ecbnh c\u1ee7a hàm s\u1ed1 là <\/p>$\\begin{cases}2-sinx\\ge0\\\\cosx\\ne0\\\\tanx\\ne0\\end{cases} $<\/span> $\\Leftrightarrow \\begin{cases}cosx\\ne0\\\\sinx\\ne0\\end{cases} $<\/span><\/p>$\\Leftrightarrow sin2x\\ne 0 \\Leftrightarrow 2x\\ne k\\pi \\Leftrightarrow x\\ne k\\dfrac{\\pi}{2},k\\in Z$<\/span><\/p>T\u1eadp xác \u0111\u1ecbnh c\u1ee7a hàm s\u1ed1 là $D=R\\setminus \\bigg\\{k\\dfrac{\\pi}{2},k\\in Z\\bigg\\}$<\/span><\/p>Ch\u1ecdn C.<\/strong> $D=R\\setminus \\bigg\\{k\\dfrac{\\pi}{2},k\\in Z\\bigg\\}$<\/span><\/span><\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2023-11-20 01:24:11","option_type":"math","len":0},{"id":"4767","post_id":"7038","mon_id":"1158924","chapter_id":"1159141","question":"Trong các m\u1ec7nh \u0111\u1ec1 sau, m\u1ec7nh \u0111\u1ec1 nào \u0111úng<\/strong>?<\/p>","options":["A.<\/strong> Các hàm s\u1ed1 y = sinx, y = cosx, y=cotx \u0111\u1ec1u là hàm s\u1ed1 ch\u1eb5n","B.<\/strong> Các hàm s\u1ed1 y = sinx, y = cotx, y=tanx \u0111\u1ec1u là hàm s\u1ed1 l\u1ebb","C.<\/strong> Các hàm s\u1ed1 y = sinx, y = cotx, y=tanx \u0111\u1ec1u là hàm s\u1ed1 ch\u1eb5n","D.<\/strong> Các hàm s\u1ed1 y = sinx, y = cosx, y=cotx \u0111\u1ec1u là hàm s\u1ed1 l\u1ebb"],"correct":"2","level":"3","hint":"","answer":"Hàm s\u1ed1  y = sinx là hàm s\u1ed1 l\u1ebb<\/p>Hàm s\u1ed1 y = cosx là hàm s\u1ed1 ch\u1eb5n<\/p>Hàm s\u1ed1 y = tanx là hàm s\u1ed1 l\u1ebb<\/p>Hàm s\u1ed1 y = cotx là hàm s\u1ed1 l\u1ebb<\/p>Ch\u1ecdn B.<\/strong> Các hàm s\u1ed1 y = sinx, y = cotx, y=tanx \u0111\u1ec1u là hàm s\u1ed1 l\u1ebb<\/span><\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2023-11-20 01:32:33","option_type":"txt","len":3},{"id":"4768","post_id":"7038","mon_id":"1158924","chapter_id":"1159141","question":"Trong các hàm s\u1ed1 y = sinx, y = cosx, y = tanx, y = cotx, có bao nhiêu hàm s\u1ed1 mà \u0111\u1ed3 th\u1ecb c\u1ee7a chúng \u0111\u1ed1i x\u1ee9ng qua tr\u1ee5c tung?<\/p>","options":["A.<\/strong> 1","B.<\/strong> 2","C.<\/strong> 3","D.<\/strong> 4"],"correct":"1","level":"3","hint":"","answer":"\u0110\u1ed3 th\u1ecb hàm s\u1ed1 ch\u1eb5n nh\u1eadn tr\u1ee5c tung làm tr\u1ee5c \u0111\u1ed1i x\u1ee9ng.<\/p>\u0110\u1ed3 th\u1ecb hàm s\u1ed1 l\u1ebb nh\u1eadn g\u1ed1c t\u1ecda \u0111\u1ed9 làm tâm \u0111\u1ed1i x\u1ee9ng.<\/p>V\u1eady có 1 hàm s\u1ed1 y = cosx th\u1ecfa mãn.<\/p>Ch\u1ecdn A.<\/strong> 1<\/span><\/p>","type":"choose","extra_type":"classic","user_id":"131","test":"0","date":"2023-11-20 01:36:08","option_type":"txt","len":0}]}