### Home > CALC > Chapter 8 > Lesson 8.1.4 > Problem 8-43

8-43.

Differentiate. Homework Help ✎

(sec(5 ln *x*))( *k*^{2}9^{3}^{k}^{−1})(sin ^{2}*x*cos*x*)

Quotient Rule.

We know that *k* is a variable (not a constant) because it appears in the

Product Rule.