Q. What is the period of y=3cos(x−7)+2 ?Give an exact value.units
Identify function and period: Identify the basic function and its period.The basic function here is cos(x), which has a period of 2π.
Coefficient of x: Determine if the coefficient of x affects the period.The coefficient of x inside the cosine function is 1 (since it's (x−7), equivalent to 1×(x−7)). This does not affect the period of the cosine function.
Other factors affecting period: Determine if there are any other factors that affect the period.The function y=3cos(x−7)+2 has a vertical stretch factor of 3 and a vertical shift of +2, but these do not affect the period of the function. The horizontal shift of −7 also does not affect the period.
Conclude the period: Conclude the period of the given function.Since the period of the basic cosine function is 2π and there are no factors in y=3cos(x−7)+2 that affect the period, the period of the given function is also 2π.