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Notation in trig is problematic.

\( cos^{-1}x \ne cos(x)^{-1} \ne \dfrac{1}{cosx}\)

In reality, \( cos^{-1}x = arccos(x)\)

\( cos^{3}x \ne cos x^3 \)

This is powers: \( cos^{3}x = (cos x)^3 \)


How would you fix this system?



.: [PRE-CALC], [Twitter], [Notation].
that's it.