### Home > CALC > Chapter 4 > Lesson 4.3.1 > Problem 4-98

4-98.

To make this problem quicker to solve, remember that*y* = cos*x* is an even function.

Notice that this is an indefinite integral. Don't forget the +*C*.

2.7183 ≈ *e* (Euler's number) and the derivative of ln(*x*) is *x*^{−1}.

Think! Trig identity. Simplify the integrand before you integrate.