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  • 02-03-2019
  • Mathematics
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lastbenchstudent
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  • 02-03-2019

[tex]sec \: x \: = - 2 \\ \frac{1}{cos \: x} = - 2 \\ cos \: x \: = - \frac{1}{2} \\ x \: = \: \frac{2\pi}{3} \: or \: \frac{4\pi}{3} [/tex]

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