Step 2 du We let u 7x and have determined that 7 Applying these gives the following result dx d dx sin u d sin 7x dx 1 du 1 u dx

Question

Step 2 du We let u 7x and have determined that 7 Applying these gives the following result dx d dx sin u d sin 7x dx 1 du 1 u dx 7 1 1 49 1 7 x 7 Therefore differentiating f x sin 7x gives us the following f x

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