Get better at MATH and Computer Science with Brilliant at to get started for free and to get 20% off an annual premium subscription! FULL PLAYLIST: ►LINEAR ALGEBRA: ♡♡♡SUPPORT THE CHANNEL♡♡♡ ►Support on PATREON: ► CURIOSITY BOX: use CODE drtrefor for 25% off awesome STEM merch boxes ► MATH BOOKS I LOVE (affiliate link): 0:00 Rotations Geometrically 2:07 Are Rotations Linear? 5:12 Rotation Matrices 6:41 Properties of Rotation Matrices 12:51 Composition of Rotations 14:27 Eigenvalues/Eigenvectors 18:23 Higher Dimensional Rotations COURSE PLAYLISTS: ►DISCRETE MATH: ►LINEAR ALGEBRA: ►CALCULUS I: ►CALCULUS II: ►MULTIVARIABLE CALCULUS (Calc III): ►VECTOR CALCULUS (Calc IV) ►DIFFERENTIAL EQUATIONS: ►LAPLACE TRANSFORM: ►GAME THEORY: OTHER PLAYLISTS: ►Cool Math Series: ► Learning Math Series SOCIALS: ►X/Twitter: ►TikTok: @drtrefor ►Instagram (photography based):