Trigonometry Question
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Grade 11 Trigonometry CCSS: HSF-TF.A.4
Which of the following are equal to cos([math](7π)/6[/math])? Choose all that apply.
- cos([math](-7π)/6[/math])
- cos([math](15π)/6[/math])
- cos([math](5π)/6[/math])
- None of the above
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