The value of d, when the function is at its minimum is -4.
A function is a law that relates two variables namely, a dependent and an independent variable.
A function always has a defined range and domain, domain is all the value a function can have as an input and range is all the value that a function can have.
The function is of various types, logarithmic, exponential, quadratic, radical etc.
The function is y = cos [tex]\rm \theta[/tex] + d
The minimum value of the function, y = cos [tex]\rm \theta[/tex] + d is -5.
The minimum value is the lowest value of the function.
The minimum value of cos [tex]\rm \theta[/tex] is at 180 degree equals to -1
Substituting the value in the equation.
-5 = - 1 + d
d = -5 +1
d = -4
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