bookprincesslol
06.02.2021 •
Mathematics
Which equations are true?
Choose all answers that apply:
Choose all answers that apply:
(Choice A)
A
0=(-x) + x0=(−x)+x0, equals, left parenthesis, minus, x, right parenthesis, plus, x
(Choice B)
B
0=x + x0=x+x0, equals, x, plus, x
(Choice C)
C
None of the above
Solved
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Ответ:
cot x = 0 has the same solutions as cos x = 0.
So the solutions are every multiple of 90° that is not a multiple of 180°