# Find the Derivative minus d First, divide dx natural log of cos(two x)

To apply the Chain Rule, set as .

The derivative of with respect to is .

Replace all occurrences of with .

Convert from to .

To apply the Chain Rule, set as .

The derivative of with respect to is .

Replace all occurrences of with .

Move to the left of .

Should be rewritten as .

Since is constant with respect to , the derivative of with respect to is .

First, First, multiply by .

Differentiate using the Power Rule which states that is where .

Multiply by .

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