Merge commit '421c'

题库0.3/Problems.json

@@ -179123,7 +179123,7 @@
         ],
         "genre": "解答题",
         "ans": "$x=\\pi+\\arcsin \\dfrac 13$",
-        "solution": "因为$\\sin (\\pi -x)=\\sin x=-\\dfrac 13$, 且由$\\pi <x<\\dfrac{3\\pi }2$知, $-\\dfrac{\\pi }2<\\pi -x<0$,\n所以$\\pi -x=\\arcsin (-\\dfrac 13)=-\\arcsin \\dfrac 13$, 于是$x=\\pi +\\arcsin \\dfrac 13$.",
+        "solution": "因为$\\sin (x- \\pi)=-\\sin x=\\dfrac 13$, 且由$\\pi <x<\\dfrac{3\\pi }2$知, $0<x- \\pi<\\dfrac{\\pi }2$,\n所以$x- \\pi=\\arcsin (\\dfrac 13)$, 于是$x=\\pi +\\arcsin \\dfrac 13$.",
         "duration": -1,
         "usages": [
             "20220920\t2023届高三01班\t0.933",