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OpenStudy (anonymous):
does sec (theta) = sec (- theta)
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OpenStudy (anonymous):
yes
OpenStudy (anonymous):
yes because sec(x) is an EVEN function
OpenStudy (anonymous):
oh ok so the odd-even property!
OpenStudy (anonymous):
cos is an even function, so cos (- theta) = cos(theta). Hence, its reciprocal must also be an even function.
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