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Cklug53411go
Cklug53411go
Mathematics
Answered
Cos^ -1 (-x)=-Cos^ -1 xfor-1<= x<=1 true or false
Answer :
LammettHashgo
LammettHashgo
It's
false
. Take x = -1, then
cos⁻¹(-(-1)) = cos⁻¹(1) = 0
but
-cos⁻¹(-1) = -π
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