Yes it is true:
(1 - cos^2 x) = sin^2 x Sqr.(1 - cos^2 x) = sin x and (-sinx) True, since sin x negative. Also, x terminates in quadrant 3 and 4. Hope this is helpful

Just plug x in and you'll get each y value.
So the answer is A.
I HOPE THE ABOVE INFORMATION WILL HELP YOU.
Thank you.
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I believe its the first one, think of it like a mirror you would flip the shape which would do make x negative and y positive, sorry if im wrong