Cklug53411 Cklug53411

04-02-2022
Mathematics

contestada

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

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LammettHash LammettHash

04-02-2022

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

cos⁻¹(-(-1)) = cos⁻¹(1) = 0

but

-cos⁻¹(-1) = -π

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