For each expression in Column I, choose the expression from Column II that completes an identity. I csc x = II A. 1 sin x B. 1 cos x C. sin x cos x D. 1 cot2 x E. 1 cos2 x F. cos x sin x

1.1 Systems of Linear Equations Linear equation – equation written in the form “a x +a x +…+a x =b” where 1 1 2 2 n n b & coefficients a 1…,a nre real or complex numbers, usually known in advance System of Linear Equations (linear system) – a collection of one or more linear equations involving the same variables Solution – a list (1 2s ,…,n ) of numbers that...