Because we can safely drop the brackets without losing ambiguity, which means less effort when writing it out by hand. $$ \cos^2x = \cos^2(x) = \cos(x)^2 \neq \cos x^2 $$
↧
Because we can safely drop the brackets without losing ambiguity, which means less effort when writing it out by hand. $$ \cos^2x = \cos^2(x) = \cos(x)^2 \neq \cos x^2 $$