From 588070c130eadb1224dd93db5bd4135b988312af Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mert=20G=C3=B6r?= <mertgor@masscollabs.xyz>
Date: Mon, 6 Jan 2025 10:08:06 +0300
Subject: [PATCH] update

---
 ChangeLog             |  8 ++++++++
 c-basic/log.c         | 13 +++++++++++++
 c-basic/sin_cos_tan.c | 24 ++++++++++++++++++++++++
 3 files changed, 45 insertions(+)
 create mode 100644 c-basic/log.c
 create mode 100644 c-basic/sin_cos_tan.c

diff --git a/ChangeLog b/ChangeLog
index e52b2d6..52d77e0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2025-01-06  Mert Gör  <mertgor@masscollabs.xyz>
+
+	* c-basic/CSD-C-Basic-Book/C.pdf: Sabitler(Literals) page 31
+
+	* c-basic/sin_cos_tan.c (main): other mathematical operations like sin cos asin acos tan atan functions
+
+	* c-basic/log.c (main): page 30-31 log code
+
 2025-01-03  Mert Gör  <mertgor@masscollabs.xyz>
 
 	* c-basic/pow.c (main): pow example written
diff --git a/c-basic/log.c b/c-basic/log.c
new file mode 100644
index 0000000..650acad
--- /dev/null
+++ b/c-basic/log.c
@@ -0,0 +1,13 @@
+#include <stdio.h>
+#include <math.h>
+
+int main()
+{
+  double result;
+
+  result = log10(1000);
+
+  printf("%f\n", result);
+
+  return 0;
+}
diff --git a/c-basic/sin_cos_tan.c b/c-basic/sin_cos_tan.c
new file mode 100644
index 0000000..aad4130
--- /dev/null
+++ b/c-basic/sin_cos_tan.c
@@ -0,0 +1,24 @@
+#include <stdio.h>
+#include <math.h>
+
+int main()
+{
+  double result;
+  
+  result = sin(3.141592653589793238462643 / 6);
+  printf("%f\n", result);
+
+  result = cos(3.141592653589793238462643 / 3);
+  printf("%f\n", result);
+
+  result = sin(3.141592653589793238462643 / 4) / cos(3.141592653589793238462643 / 4);
+  printf("%f\n", result);
+
+  result = tan(3.141592653589793238462643 / 2);
+  printf("%f\n", result);
+
+  result = tan(3.141592653589793238462643 / 4);
+  printf("%f\n", result);
+
+  return 0;
+}