修改21667答案

题库0.3/Problems.json

@@ -588425,7 +588425,7 @@
             "第三单元"
         ],
         "genre": "解答题",
-        "ans": "当$\\alpha=\\dfrac{\\pi}{2}-\\theta$时，竹竿的影子最长，最长为$\\dfrac{\\sin(\\alpha+\\theta)}{\\sin \\theta}*l$.",
+        "ans": "当$\\alpha=\\dfrac{\\pi}{2}-\\theta$时, 竹竿的影子最长.",
         "solution": "",
         "duration": -1,
         "usages": [
@@ -588440,7 +588440,8 @@
         ],
         "origin": "2025届高一下校本作业",
         "edit": [
-            "20230209\t王伟叶"
+            "20230209\t王伟叶",
+            "20240208\t王伟叶"
         ],
         "same": [],
         "related": [],