Maclaurin Series, How can I find the answer?

How can I find the answer with MATLAB in this problem?

Answer 1

[Sahil Jain]

Hi. You can use a "for" loop to calculate this series as follows.

x = pi/3;
cosx = 1;
n = 10; % number of terms in the series
for i=1:n
    cosx = cosx + (-1)^i*x^(2*i)/factorial(2*i);
end