rotX.m

% rotX : Returns a rotation matrix for rotation about X axis 
% 
% R = rotX(theta) Returns a rotation matrix describing a rotation about 
% the X axis (theta in radians).
% 
% output1 = 3-by-3 rotation matrix 
% output2 = description of what the second output is/means include units if appropriate 
% 
% input1 = theta represent a rotation about X in radians
% input2 = description of what the second input is/means include units if appropriate 
% 
% Abhilesh Borode
% 10830440
% MEGN 544 
% 18th Nov 2018

function R = rotX(theta)
   R=[1,0,0;0,cos(theta),-sin(theta);0,sin(theta),cos(theta)] %rotation matrix about X axis
end