Support the production of this course by joining Wrath of Math to access all my Linear Algebra videos plus lecture notes at the premium tier! 🛍 Check out my math fashion brand! Linear Algebra course: Linear Algebra exercises: Get the textbook! Business Inquiries: wrathofmathlessons@ We discuss how to find the determinant of triangular matrices of any size. This includes determinants of upper triangular matrices, determinants of lower triangular matrices, and determinants of diagonal matrices. We see through a generalized example of the cofactor expansion that to calculate the determinant of a triangular matrix, we need only multiply the entries in the main diagonal. #linearalgebra Minors and Cofactors: Cofactor Expansion of the Determinant: ★DONATE★ ◆ Support Wrath of Math on Patreon for early access to new videos and other exclusive benefits: ◆ Donate on PayPal: Follow Wrath of Math on... ● Instagram: ● Twitter: