The linear system Ax = b given by 1 2 " *1 3 1.00001 2 . X 2 3.00001has solution (1, I)'. Use seven-digit rounding arithmetic to find the solution ofthe perturbed system 10. 11. 12. 1. 1 2 " X\ ' 3.00001 1.000011 2 *2 3.00003 has solution (1, I)'. Use seven-digit rounding arithmetic to find the solution ofthe perturbed system 10. 11. 12. 1. 1 2 " X\ ' 3.00001 1.000011 2 *2 3.00003 and compare the actual error to the estimate (7.25). Is A ill conditioned?

L4 - 6 ex. Use a triangle to ﬁnd the exact value: sin(tan (−2)) −1 ex. Use a triangle to simplify the expression: cos(2tan x)