# Find the Derivative – d/dx y = natural log of sec(x)+tan(x)

Differentiate using the chain rule, which states that is where and .
To apply the Chain Rule, set as .
The derivative of with respect to is .
Replace all occurrences of with .
By the Sum Rule, the derivative of with respect to is .
The derivative of with respect to is .
The derivative of with respect to is .
Reorder the factors of .
Find the Derivative – d/dx y = natural log of sec(x)+tan(x)

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