Cos^ -1 (-x)=-Cos^ -1 xfor-1<= x<=1 true or false

Jiy asked Apr 13, 2023

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31 votes

Jiy asked Apr 13, 2023

by Jiy

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5 votes

It's false. Take x = -1, then

cos⁻¹(-(-1)) = cos⁻¹(1) = 0

but

-cos⁻¹(-1) = -π

MowDownJoe answered Apr 18, 2023

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