{"common":{"save":0,"post_id":"6320","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"5816","mon_id":"1158767","chapter_id":"1158829","post_id":"6320","question":"<p>\u0110\u1eb3ng th\u1ee9c nào sau \u0111ây <strong>\u0111úng<\/strong>?<\/p>","options":["<strong>A.<\/strong> <span class=\"math-tex\">$\\tan(180^o+ \\alpha)=-\\tan \\alpha$<\/span> . ","<strong>B<\/strong>. <span class=\"math-tex\">$\\cos(180^o- \\alpha)=-\\cos \\alpha$<\/span> .","<strong>C.<\/strong> <span class=\"math-tex\">$\\sin(180^o+ \\alpha)=\\sin\\alpha$<\/span> .","<strong>D<\/strong>. <span class=\"math-tex\">$\\cot(180^o+ \\alpha)=-\\cot \\alpha$<\/span> ."],"correct":"2","level":"1","hint":"","answer":"<p>\u0110áp án \u0111úng là<strong style=\"color: rgb(39, 174, 96);\"> B<\/strong><font color=\"#27ae60\">. <\/font><span class=\"math-tex\">$\\cos(180^o- \\alpha)=-\\cos \\alpha$<\/span><font color=\"#27ae60\"> .<\/font><\/p><p>Hai góc bù nhau.<\/p>","type":"choose","extra_type":"classic","user_id":"147","test":"0","date":"2022-10-18 08:35:55","option_type":"math","len":0},{"id":"5817","mon_id":"1158767","chapter_id":"1158829","post_id":"6320","question":"<p>Trong các \u0111\u1eb3ng th\u1ee9c sau \u0111ây, \u0111\u1eb3ng th\u1ee9c nào <strong>\u0111úng<\/strong>?<\/p>","options":["<strong>A<\/strong>. <span class=\"math-tex\">$\\sin150^o=-\\frac{\\sqrt{3}}{2}$<\/span> .","<strong>B<\/strong>. <span class=\"math-tex\">$\\cos150^o=\\frac{\\sqrt{3}}{2}$<\/span> .","<strong>C<\/strong>. <span class=\"math-tex\">$\\tan150^o=-\\frac{1}{\\sqrt{3}}$<\/span> .","<strong>D<\/strong>. <span class=\"math-tex\">$\\cot150^o=\\sqrt{3}$<\/span> ."],"correct":"3","level":"1","hint":"","answer":"<p><span style=\"color:#27ae60;\"><\/span>\u0110áp án \u0111úng là <span style=\"color:#27ae60;\"><strong> C<\/strong>. <span class=\"math-tex\">$\\tan150^o=-\\frac{1}{\\sqrt{3}}$<\/span> .<\/span><\/p><p><span style=\"color:#27ae60;\"><\/span>Giá tr\u1ecb l\u01b0\u1ee3ng giác c\u1ee7a góc \u0111\u1eb7c bi\u1ec7t.<span style=\"color:#27ae60;\"><\/span><\/p>","type":"choose","extra_type":"classic","user_id":"147","test":"0","date":"2022-10-18 08:39:49","option_type":"math","len":0},{"id":"5818","mon_id":"1158767","chapter_id":"1158829","post_id":"6320","question":"<p>B\u1ea5t \u0111\u1eb3ng th\u1ee9c nào d\u01b0\u1edbi \u0111ây là \u0111úng?<\/p>","options":["<strong>A<\/strong>. <span class=\"math-tex\">$\\sin90^o<\\sin100^o$<\/span> . ","<strong>B<\/strong>. <span class=\"math-tex\">$\\cos95^o>\\cos100^o$<\/span> . ","<strong>C<\/strong>. <span class=\"math-tex\">$\\tan85^o<\\tan125^o$<\/span>. ","<strong>D<\/strong>. <span class=\"math-tex\">$\\cos145^o>\\cos125^o$<\/span> ."],"correct":"2","level":"1","hint":"<p><span style=\"color:#27ae60;\"><\/span><br \/> <\/p>","answer":"<p>\u0110áp án \u0111úng là<font color=\"#27ae60\"><b> <\/b><\/font><strong><span style=\"color:#16a085;\">B. <span class=\"math-tex\">$\\cos95^o>\\cos100^o$<\/span><\/span><\/strong><\/p>","type":"choose","extra_type":"classic","user_id":"147","test":"0","date":"2022-10-18 08:43:43","option_type":"math","len":0}]}
