Consider the function f(x) = cos(0.65x). i. How much does a have to vary for the argument of f to vary by 2n? Preview ii. What is the period of f? * Preview b. Consider the function g(x) = sin(5m2). i. How much does a have to vary for the argument of g to vary by 2n? 萬 Preview ii. What is the period of g?