If F(0)=3 and F(n) = [tan'(F(n 1)) n] .what is the value of F(20)? You may need to lookup the ceil function (the part that appears in parentheses that look like "T") using Matlab's built-in help section, e.g. "help ceil". Furthermore, the trig function here is the inverse tangent function (in Matlab given by the "atan" function) not 1/tan. If F(0)=3 and F(n) = [tan'(F(n 1)) n] .what is the value of F(20)? You may need to lookup the ceil function (the part that appears in parentheses that look like "T") using Matlab's built-in help section, e.g. "help ceil". Furthermore, the trig function here is the inverse tangent function (in Matlab given by the "atan" function) not 1/tan.