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OpenStudy (ksaimouli):
sec(−5Π/4)
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OpenStudy (anonymous):
first find \[\cos(-\frac{5\pi}{4})\]then take the reciprocal (flip it)
OpenStudy (ksaimouli):
i got |dw:1326122836492:dw|
OpenStudy (anonymous):
yes but you do not want to leave it in this form
OpenStudy (ksaimouli):
oh yup
OpenStudy (anonymous):
rationalize the denominator and get \[-\sqrt{2}\]
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OpenStudy (ksaimouli):
|dw:1326122898934:dw|
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