### Home > PC > Chapter 10 > Lesson 10.1.4 > Problem 10-56

10-56.

What is the value of *a* given and

**are orthogonal?**

If two vectors are orthogonal, then their dot product is

Now set the dot product .

10-56.

What is the value of *a* given and

If two vectors are orthogonal, then their dot product is

Now set the dot product .