SOLUTION: find solution cos(2 arcsin x)=-1

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Question 764925: find solution cos(2 arcsin x)=-1
Answer by tommyt3rd(5050) About Me  (Show Source):
You can put this solution on YOUR website!
%0D%0Acos%282+arcsin%28+x%29%29=-1%0D%0A
rewriting in terms if sine...
%0D%0A1-2sin%5E2%28arcsin%28x%29%29=-1%0D%0A

simplifying...
x%5E2=1


x=1 or x=-1


:)