Difference between revisions of "Arccos as inverse cosine"
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Latest revision as of 20:06, 22 November 2016
Theorem
The restricted arccos function $\rm{arccos} \colon [-1,1] \rightarrow [0,\pi]$ is the inverse function of the restricted cosine function $\cos \colon \left[0,\pi\right] \rightarrow [-1,1]$.
