Với giải Luyện tập 1 trang 23 Toán 11 Tập 1 Kết nối tri thức chi tiết trong Bài 3: Hàm số lượng giác giúp học sinh dễ dàng xem và so sánh lời giải từ đó biết cách làm bài tập Toán 11. Mời các bạn đón xem:
Giải bài tập Toán lớp 11 Bài 3: Hàm số lượng giác
Luyện tập 1 trang 23 Toán 11 Tập 1: Tìm tập xác định của hàm số format('truetype')%3Bfont-weight%3Anormal%3Bfont-style%3Anormal%3B%7D%3C%2Fstyle%3E%3C%2Fdefs%3E%3Ctext%20font-family%3D%22Arial%22%20font-size%3D%2216%22%20font-style%3D%22italic%22%20text-anchor%3D%22middle%22%20x%3D%224.5%22%20y%3D%2226%22%3Ey%3C%2Ftext%3E%3Ctext%20font-family%3D%22math11824c643d1feb4da18b28ed527%22%20font-size%3D%2216%22%20text-anchor%3D%22middle%22%20x%3D%2217.5%22%20y%3D%2226%22%3E%3D%3C%2Ftext%3E%3Cline%20stroke%3D%22%23000000%22%20stroke-linecap%3D%22square%22%20stroke-width%3D%221%22%20x1%3D%2228.5%22%20x2%3D%2260.5%22%20y1%3D%2220.5%22%20y2%3D%2220.5%22%2F%3E%3Ctext%20font-family%3D%22Arial%22%20font-size%3D%2216%22%20text-anchor%3D%22middle%22%20x%3D%2244.5%22%20y%3D%2215%22%3E1%3C%2Ftext%3E%3Ctext%20font-family%3D%22Arial%22%20font-size%3D%2216%22%20text-anchor%3D%22middle%22%20x%3D%2240.5%22%20y%3D%2237%22%3Esin%3C%2Ftext%3E%3Ctext%20font-family%3D%22Arial%22%20font-size%3D%2216%22%20font-style%3D%22italic%22%20text-anchor%3D%22middle%22%20x%3D%2254.5%22%20y%3D%2237%22%3Ex%3C%2Ftext%3E%3Ctext%20font-family%3D%22math11824c643d1feb4da18b28ed527%22%20font-size%3D%2216%22%20text-anchor%3D%22middle%22%20x%3D%2265.5%22%20y%3D%2226%22%3E.%3C%2Ftext%3E%3C%2Fsvg%3E)
Lời giải:
Biểu thức 
có nghĩa khi sin x ≠ 0, tức là x ≠ kπ (k ∈ ℤ).
Vậy tập xác định của hàm số format('truetype')%3Bfont-weight%3Anormal%3Bfont-style%3Anormal%3B%7D%3C%2Fstyle%3E%3C%2Fdefs%3E%3Ctext%20font-family%3D%22Arial%22%20font-size%3D%2216%22%20font-style%3D%22italic%22%20text-anchor%3D%22middle%22%20x%3D%224.5%22%20y%3D%2226%22%3Ey%3C%2Ftext%3E%3Ctext%20font-family%3D%22math17f39f8317fbdb1988ef4c628eb%22%20font-size%3D%2216%22%20text-anchor%3D%22middle%22%20x%3D%2217.5%22%20y%3D%2226%22%3E%3D%3C%2Ftext%3E%3Cline%20stroke%3D%22%23000000%22%20stroke-linecap%3D%22square%22%20stroke-width%3D%221%22%20x1%3D%2228.5%22%20x2%3D%2260.5%22%20y1%3D%2220.5%22%20y2%3D%2220.5%22%2F%3E%3Ctext%20font-family%3D%22Arial%22%20font-size%3D%2216%22%20text-anchor%3D%22middle%22%20x%3D%2244.5%22%20y%3D%2215%22%3E1%3C%2Ftext%3E%3Ctext%20font-family%3D%22Arial%22%20font-size%3D%2216%22%20text-anchor%3D%22middle%22%20x%3D%2240.5%22%20y%3D%2237%22%3Esin%3C%2Ftext%3E%3Ctext%20font-family%3D%22Arial%22%20font-size%3D%2216%22%20font-style%3D%22italic%22%20text-anchor%3D%22middle%22%20x%3D%2254.5%22%20y%3D%2237%22%3Ex%3C%2Ftext%3E%3C%2Fsvg%3E)
là ℝ \ {kπ | k ∈ ℤ}.
