Question 47861
a.) f(x) = cos^2(x) = cos(x)^2
This means that there are no negative values, but there are zero values.
{{{graph(600,600,-10,10,-10,10,cos(x)^2)}}}
Period: {{{pi}}}
b.) f(x) = |sin(x)| = sqrt(sin(x)^2)
This means that there are no negative values, but there are zero values once again.
{{{graph(600,600,-10,10,-10,10,sqrt(sin(x)^2))}}}
Period: {{{pi}}}
c.) f(x) = 3*cos(4x) - 1
Period: {{{2(pi)/a}}} where {{{a}}} is the coefficient = {{{2(pi)/4 = (pi)/2}}}
{{{graph(600,600,-10,10,-10,10,3*cos(4x) - 1,-1)}}}