Learning objectives

• Find coordinates relative to an orthonormal basis
• Use and orthonormal basis to compute projections onto a subspace
• Understand orthogonal transformations geometrically

Before class

• Read Lay sections 6.2 and 6.3
• Consult notes to the textbook (if you wish)
• Ponder Lay problems  6.2: 27; 6.3: 1, 3, 11, 21.
• Post to Piazza

In class

• Problems concerning orthogonality
• Quiz 3