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OpenStudy (anonymous):
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OpenStudy (anonymous):
\[sinx * tanx/cosx = tanx * tanx = \tan^2x\]
OpenStudy (anonymous):
a. 1+tan^2x/ cos^2 x = (sec^2x / cos^2x) = sec^4x b. sinx *secx/cotx = sinx *(secx/cotx) = sinx/cosx * sinx cosx = sin^2x/cos^2x = tan^2x
OpenStudy (anonymous):
thanks!
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