richjessica2002
richjessica2002 richjessica2002
  • 06-01-2019
  • Mathematics
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please answer with explanation

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SFM19613
SFM19613 SFM19613
  • 06-01-2019

[tex] - 1 \: \leqslant \: \cos( \alpha ) \: \leqslant \: 1[/tex]

[tex]y \: = \: \cos( \frac{x}{2} ) [/tex]
[tex] \cos( \alpha ) \: = \: - 1 \: = \: \cos( \frac{x}{2} ) [/tex]
[tex] \alpha \: = \: {\pi }^{ c} [/tex]
[tex] \frac{x}{2} \: = \: \pi[/tex]
[tex]x \: = \: 2\pi[/tex]

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