Merge commit '8e0e'

题库0.3/Problems.json

@@ -220324,7 +220324,7 @@
             "第三单元"
         ],
         "genre": "解答题",
-        "ans": "$(\\sin\\alpha,\\cos\\alpha,\\tan\\alpha)=(\\dfrac{2\\sqrt{5}}5,-\\dfrac{\\sqrt{5}}5,2)$或$(-\\dfrac{2\\sqrt{5}}5,\\dfrac{\\sqrt{5}}5,2)$",
+        "ans": "$(\\sin\\alpha,\\cos\\alpha,\\tan\\alpha)=(\\dfrac{2\\sqrt{5}}5,-\\dfrac{\\sqrt{5}}5,-2)$或$(-\\dfrac{2\\sqrt{5}}5,\\dfrac{\\sqrt{5}}5,-2)$",
         "solution": "",
         "duration": -1,
         "usages": [