What-does-sin-2-x-mean-

Question Number 63747 by Tony Lin last updated on 08/Jul/19

W h a t d o e s {s i n}^{- 2} x m e a n ?

Commented by MJS last updated on 08/Jul/19

{that}^{'} s the question \dots

{we}^{'} re not consequent in these things

f^{- 1} (x) means the inverse function of f (x)

some people use

f^{1} (x) = f^{'} (x)

f^{2} (x) = f^{″} (x)

\dots

for trigonometric functions usually

\sin^{- 1} x = \arcsin x

\cos^{- 1} x = \arccos x

\dots

but

\sin^{2} x = {(\sin x)}^{2}

\dots

so

\sin^{- 2} x could mean different things

\frac{1}{\sin^{2} x}

\arcsin^{2} x

\frac{1}{{(\sin x)}^{″}}

{it}^{'} s a shame

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