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OpenStudy (anonymous):
given cos((pi/2)-x) and sec x<0, use trig identities and find cot x. Show work Thanks:)
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OpenStudy (amoodarya):
|dw:1388434309847:dw|
OpenStudy (amoodarya):
so sinx<0 and secx<0 means 1/cos x <0 so cos x <0
OpenStudy (amoodarya):
|dw:1388434415490:dw|
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