Find all the values of x such that for the real number a, the following is true.
y = cos x; [0, 4π]; a = 1/2
cos π/3 = 1/2
So, use π/3 as your reference angle.
cosine is positive in QI,QIV, and has a period of 2π.
y = cos x; [0, 4π]; a = 1/2
So, use π/3 as your reference angle.
cosine is positive in QI,QIV, and has a period of 2π.