This is a fun article! Alternative avenues that complement the approaches shown: - Padé Approximants (https://en.wikipedia.org/wiki/Pad%C3%A9_approximant http

This is a fun article! Alternative avenues that complement the approaches shown: - Padé Approximants (https://en.wikipedia.org/wiki/Pad%C3%A9_approximant https://en.wikipedia.org/wiki/Pad%C3%A9_approximant) can be better than long Taylor Series for this kind of thing. - Bhaskara I's sin approximation (https://en.wikipedia.org/wiki/Bhaskara_I%27s_sine_approximation_formula https://en.wikipedia.org/wiki/Bhaskara_I%27s_sine_approximat...) is easily adaptable to cosine, remarkably accurate for its simplicity and also fast to calculate.