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OpenStudy (anonymous):
F' (x) where F(x)=tan(x)
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OpenStudy (jamesj):
Write tan x = sin x / cos x and use the quotient rule.
OpenStudy (anonymous):
The derivative of tangent is sec^2x... it is just a rule to memorize.
OpenStudy (jamesj):
No, it's not just a rule to memorize. The purpose of the exercise is to see why it is the case.
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