Question for beginners: Where is the sin function in ubuntu?

Question for beginners: Where is the sin function in ubuntu-general Linux technology-Linux technology and application information? For details, refer to the following. I wrote a small program using vim in ubuntu and used the sin function, but it cannot be compiled.
I used root @ ubuntu:/root # nm-o/lib/*. so | grep sin to find the sin function, but I cannot find it. The following statement is displayed:
Nm:/lib/klibc-YHMcsdavQye9iuNwPByVrU6ZqHQ.so: no symbols
Nm:/lib/libproc-3.2.8.so: no symbols
Then you can use # ls/lib to view the following statements:
Apparmor libnss_mdns4.so.2
Brltty libnss_mdns6_minimal.so.2
Cpp libnss_mdns6.so.2
Dbus-1.0 (libnss_mdns_minimal.so.2)
Firmware libnss_mdns.so.2
Libntfs-3g.so.79 hdparm
I386-linux-gnu libntfs-3g.so.79.0.0
Init libparted. so.0
Klibc-YHMcsdavQye9iuNwPByVrU6ZqHQ.so (libparted. so.0.0.1)
Ld-linux.so.2 libpcsclite. so.1
Libatasmart. so.4 libpcsclite. so.1.0.0
Libply-boot-client.so.2 libatasmart. so.4.0.3
Libatm. so.1 libply-boot-client.so.2.0.0
Libatm. so.1.0.0 libply. so.2
Libbrlapi. so.0.5 libply. so.2.0.0
Libbrlapi. so.0.5.5 libply-splash-core.so.2
Libbsd. so.0 libply-splash-core.so.2.0.0
Libbsd. so.0.2.0 libply-splash-graphics.so.2
Libbz2.so. 1 libply-splash-graphics.so.2.0.0
Libbz2.so. 1.0 libpopt. so.0
Libbz2.so. 1.0.4 libpopt. so.0.0.0
Libcap. so.2 libproc-3.2.8.so
Libcap. so.2.20 libreadline. so.6
Libcrypto. so.0.9.8 libreadline. so.6.2
The libdevmapper-event.so.1.02.1 libsepol. so.1.
Libdevmapper. so.1.02.1 libslang. so.2
Libfuse. so.2 libslang. so.2.2.2
Libfuse. so.2.8.4 libssl. so.0.9.8
Libhistory. so.6 libsysfs. so.2
Libhistory. so.6.2 libsysfs. so.2.0.1
Libip4tc. so.0 libulockmgr. so.1
Libip4tc. so.0.0.0 libulockmgr. so.1.0.1
Libip6tc. so.0 libusb-0.1.so.4
Libip6tc. so.0.0.0 libusb-0.1.so.4.4.4
Libiq_pic.so.0 libusb-1.0.so.0
Libipq_pic.so.0.0.0 libusb-1.0.so.0.0.0
Libipq. so.0 libwrap. so.0
Libipq. so.0.0.0 libwrap. so.0.7.6
Libiptc. so.0 libx86.so. 1
Libiptc. so.0.0.0 libxtables. so.5
Libiw. so.30 libxtables. so.5.0.0
Liblvm2app. so.2.2 linux-sound-base
Libncurses. so.5 lsb
Libncurses. so.5.7 modules
Libncursesw. so.5 plymouth UTH
Libncursesw. so.5.7 security
Libnih-dbus.so.1 systemd
Libnih-dbus.so.1.0.0 (terminfo)
Libinstitutes. so.1 udev
Libinstitutes. so.1.0.0 ufw
Libnss_mdns4_minimal.so.2 xtables
But I don't know which one is or there is no sin at all. Please give me some advice. The statement is a bit long and annoying. Thank you!