SOLUTION: every time i try this problem: {{{dy/dx}}} {{{ 4/cos(x)}}} my answer is undefined

SOLUTION: every time i try this problem: {{{dy/dx}}} {{{ 4/cos(x)}}} my answer is undefined

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Question 231659: every time i try this problem: my answer is undefined
Answer by kensson(21) (Show Source): You can put this solution on YOUR website!
You can use the chain rule.
differentiates to .
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