For a particular angle theta, the cosine function f(x) = a cos b(theta) has the following values within one cycle of the : - f(0) = 2, f(pi/4) = 0, f(pi/2) = -2, f(3pi/4) = 0, f(pi) = 2

what is the rule for the cosine

Amanager recorded the number of bicycles sold by his company each quarter. his projected sales after t years is given by the expression below. which of the following statements best describes the expression? a. the initial sales of 575 bicycles increases at the rate of 4% over 4 quarters. b. the initial sales of 575 bicycles increases at the rate of 18% over 4 years. c. the initial sales of 575 bicycles increases at the rate of 4% over t quarters. d. the initial sales of 575 bicycles increases at the rate of 18% over t years.

The anwser cause i do not understand just plez

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)