By the Sum Rule, the derivative of with respect to is .

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

The derivative of with respect to is .

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 .

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

Differentiate using the Power Rule which states that is where .

Multiply by .

Move to the left of .

Find the Derivative – d/dx 2sin(x)+sin(2x)