### Home > CALC > Chapter 4 > Lesson 4.1.3 > Problem 4-31

4-31.

Differentiate the following with respect to

*x*. That is, find. Homework Help ✎ *y*= cos*x*+ sin*x**y*= (6 − 5*x*)(l − 2*x*)

Simplify the fraction:

= 1 + *x* ^{−1}

Differentiate:

Be careful about + and − signs.

Before you differentiate, rewrite with exponents.

Before you differentiate, expand.