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OpenStudy (curiouslocal):
last one: secA/cosA - tanA/cotA =1
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OpenStudy (zpupster):
\[\frac{ 1/cosA }{ cosA}=\frac{ 1 }{ \cos^2A } = \sec^2A\] and \[\frac{ tanA }{ 1/tanA } = \tan^2A\]
OpenStudy (curiouslocal):
why did it become 1/cos^2A?
OpenStudy (curiouslocal):
how i mean
OpenStudy (zpupster):
sec = 1/cos
OpenStudy (zpupster):
1/cosA*1/cosA = sec^2A ok??
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