How do you write the equation $cosalpha=0.5$ in the form of an inverse function?

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Answer 1 · 2018-02-28T15:34:11

We need to solve for $alpha$

$cosalpha = 0.5$

we need to "undo" $cos$ . To do that,w e apply it's inverse, $a r c c o s$ or $cos^-1$

$cos^-1(cosalpha) = cos^-1(0.5)$

$alpha = cos^-1(0.5)$

We can solve this, which gives us that $alpha = pi/3$ or $5pi/3$

How do you write the equation cosalpha=0.5cosalpha=0.5 in the form of an inverse function?