🧪 [Test math module missing functions]

[Tcode-Motion]

🎯 What: The register_math function in stdlib/src/math.rs was not fully tested. The test_math_module test inside stdlib/tests/stdlib_tests.rs did not verify the sin, cos, tan, log, and exp functions exported by the std.math module.
📊 Coverage: The test test_math_module was expanded to call and verify the result values of sin, cos, tan, log, and exp functions.
✨ Result: Test coverage for the std.math module is improved as all exported standard mathematical functions are now actively tested.

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PR created automatically by Jules for task 1354560695727681711 started by @Tcode-Motion

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