Implement Trigonometric Functions (Sine, Cosine, Tangent)

[Arghya442]

Issue Title: Implement Trigonometric Functions (Sine, Cosine, Tangent)

Currently, the calculator cannot perform trigonometric calculations, which can be essential for various mathematical and engineering applications. Implement functions for sine, cosine, and tangent, allowing users to calculate these values directly from the calculator. While users can manually calculate trigonometric functions using formulas, adding built-in functions would simplify the process and reduce the likelihood of errors.

Additional context: This feature would be handy for students, engineers, and anyone who frequently needs to perform trigonometric calculations.

[tushargatthewar]

hey, assign me this task

[larrikin-coder]

Please assign me this task. @Arghya442