RT
arccos 1 =?
Is é an arccosine an fheidhm chosine inbhéartach.
Ó
cos 0 = cos 0º = 1
Tá an t-arccosine de 1 cothrom le feidhm chosain inbhéartach 1, atá cothrom le 0 raidian nó 0 céim:
arccos 1 = cos -1 1 = 0 rad = 0º
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