[danoli3]

Fixes #8607.

examples/graphics/linesExample called std::sinf / std::cosf (7 calls). GCC's <cmath> doesn't declare those in std, so the example didn't compile on Linux. std::sin / std::cos have float overloads, so the result is the same, and they work with every compiler.

Tested on Ubuntu 24.04 aarch64 (GCC 13): linesExample builds. It failed on master ('sinf' is not a member of 'std'), also in the all-examples build in #8605.

[danoli3]

sinf is C's float version of sin: float in, float out. sin is the double version.

• std::sin in C++'s is overloaded for float, double and long double. With a float argument it calls the float version and returns float. That's the same precision and the same work as sinf.
• std::sinf is listed in the C++ standard, but GCC's standard library (libstdc++) didn't declare it in std until GCC 14 (GCC bug 79700). Ubuntu 24.04 ships GCC 13, so std::sinf gives 'sinf' is not a member of 'std'. Clang's libc++ (macOS) and MSVC have had it for years, which is why the example only broke on Linux.