Talk:Trigonometry/Conventions

Other Convention Clashes

 * $$\displaystyle x_i$$, i used as an index, vs $$\displaystyle e^i$$, i as the square root of minus one.
 * $$\displaystyle f^{-1}(x)$$ vs $$\displaystyle x^{-1}$$; is $$\displaystyle \cos^{-1}x$$ equal to $$\displaystyle \arccos x$$ or $$\displaystyle \frac{1}{\cos x}$$?
 * Why $$\displaystyle cos^2 x $$ and not $$\displaystyle (cos x)^2$$