Find the global extrema of the function {{MATH_41}}. {{CMD_42}} Examine the graph of {{MATH_43}}. {{CMD_44}} {{ENV_45}} {{CMD_46}} From the graph, {{MATH_47}} has a highest value of {{MATH_48}} that occurs at all even multiples of {{MATH_49}}: at {{MATH_50}} for {{MATH_51}} any integer. All of these points are global maxima. The lowest value of {{MATH_52}} occurs at odd multiples of {{MATH_53}}: at {{MATH_54}} for {{MATH_55}} any integer. All of these points are global minima.