1 files changed, 14 insertions, 0 deletions
diff --git a/257/CH9/EX9.2/eg_9_2.sce b/257/CH9/EX9.2/eg_9_2.sce
new file mode 100644
index 000000000..b921c35b4
--- /dev/null
+++ b/257/CH9/EX9.2/eg_9_2.sce
@@ -0,0 +1,14 @@
+//angle condition
+s=%s
+sys=syslin('c',(k)/(s*(s+2)*(s+4)))
+
+f=-0.75;
+//disp(-atan(s,0))
+disp(-atan(f,0)-atan(f,2)-atan(f,4))
+if(-atan(f,0)-atan(f,2)-atan(f,4)==(-3.14))
+    printf("yes")
+    
+else
+    printf("no")
+end
+