How do you use the amplitude and period to graph #y = –3 cos(2θ + 45°) + 3 #?
Amplitude 3, period
General form of a sinusoidal (or sine wave) function is
Where |A| is the amplitude, period is
Now in the given function instead of sine it is cos. Hence we change it by wrting cosx as
The given function can thus be written as
Thus amplitude would be 3 and period would be