### Home > CALC > Chapter 10 > Lesson 10.1.2 > Problem 10-12

10-12.

Use substitution. Let *u* = *x*^{2}

Use substitution. Let *u* = 1/*x*.

What is the value of cos(0)?

10-12.

Use substitution. Let *u* = *x*^{2}

Use substitution. Let *u* = 1/*x*.

What is the value of cos(0)?