+0

# help!!!! SOS eëk af af af !!

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174
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how do i get the -1 on cos.. like you knnow how there are those small grey numbers on the buttons.. it's a mystery !

Guest Jun 8, 2017
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#1
+6928
0

$$\cos^{-1}$$ this one?

it is same as "acos".

MaxWong  Jun 9, 2017

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