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OpenStudy (anonymous):
Q) Show that f(x)=secx+tanx is always increasing on (-pi/2 , pi / 2)? PLEASE HELP ME SOON
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OpenStudy (amistre64):
whats the rush?
OpenStudy (anonymous):
i have an assignment and its due in 2 hours
OpenStudy (amistre64):
if a function is increasing, then it will have a positive derivative
OpenStudy (amistre64):
take the first derivative; find the zeros; and test a point that is inside the intervals to sign
OpenStudy (amistre64):
find the undefineds as well, they tend to be forgotten but important as well
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