From c6afcfeb4f0724f760b843547f75f7b2ded1055a Mon Sep 17 00:00:00 2001
From: Arthur Drobot <drobotarthur@gmail.com>
Date: Thu, 3 Aug 2017 10:30:42 -0700
Subject: [PATCH] Add tan, sec, csc, cot in terms of what we currently have.

---
 .../nwapw/abacus/plugin/StandardPlugin.java   | 52 +++++++++++++++++++
 1 file changed, 52 insertions(+)

diff --git a/src/main/java/org/nwapw/abacus/plugin/StandardPlugin.java b/src/main/java/org/nwapw/abacus/plugin/StandardPlugin.java
index a394c4b..8165588 100755
--- a/src/main/java/org/nwapw/abacus/plugin/StandardPlugin.java
+++ b/src/main/java/org/nwapw/abacus/plugin/StandardPlugin.java
@@ -321,6 +321,54 @@ public class StandardPlugin extends Plugin {
         }
     };
 
+    public static final Function FUNCTION_TAN = new Function() {
+        @Override
+        protected boolean matchesParams(NumberInterface[] params) {
+            return params.length == 1;
+        }
+
+        @Override
+        protected NumberInterface applyInternal(NumberInterface[] params) {
+            return FUNCTION_SIN.apply(params[0]).divide(FUNCTION_COS.apply(params[0]));
+        }
+    };
+
+    public static final Function FUNCTION_SEC = new Function() {
+        @Override
+        protected boolean matchesParams(NumberInterface[] params) {
+            return params.length == 1;
+        }
+
+        @Override
+        protected NumberInterface applyInternal(NumberInterface[] params) {
+            return NaiveNumber.ONE.promoteTo(params[0].getClass()).divide(FUNCTION_COS.apply(params[0]));
+        }
+    };
+
+    public static final Function FUNCTION_CSC = new Function() {
+        @Override
+        protected boolean matchesParams(NumberInterface[] params) {
+            return params.length == 1;
+        }
+
+        @Override
+        protected NumberInterface applyInternal(NumberInterface[] params) {
+            return NaiveNumber.ONE.promoteTo(params[0].getClass()).divide(FUNCTION_SIN.apply(params[0]));
+        }
+    };
+
+    public static final Function FUNCTION_COT = new Function() {
+        @Override
+        protected boolean matchesParams(NumberInterface[] params) {
+            return params.length == 1;
+        }
+
+        @Override
+        protected NumberInterface applyInternal(NumberInterface[] params) {
+            return FUNCTION_COS.apply(params[0]).divide(FUNCTION_COS.apply(params[0]));
+        }
+    };
+
     public StandardPlugin(PluginManager manager) {
         super(manager);
     }
@@ -369,6 +417,10 @@ public class StandardPlugin extends Plugin {
         registerFunction("sqrt", FUNCTION_SQRT);
         registerFunction("sin", FUNCTION_SIN);
         registerFunction("cos", FUNCTION_COS);
+        registerFunction("tan", FUNCTION_TAN);
+        registerFunction("sec", FUNCTION_SEC);
+        registerFunction("csc", FUNCTION_CSC);
+        registerFunction("cot", FUNCTION_COT);
     }
 
     @Override