Mathematics, 18.07.2019 07:30 tefanyc13
For a particular angle theta, the cosine function f(x) = a cos b(theta) has the following values within one cycle of the function. f(0) = 4; f(pi/4) = 0; f(pi/2) = -4; f(3pi/4) = 0; f(pi) = 4 what is the rule for the cosine function? a) y= 2 cos 4 theta b) y= 4 cos 2 theta c) y= -4 cos 3 theta d) y= 1/4cos 2 theta
Answers: 1
we have that 
. This means that period of cosine function is π. Then from the formula for period 
you obtain that 
and b=2. 
. If f(0)=4, then 
and, respectively, a=4.
.
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For a particular angle theta, the cosine function f(x) = a cos b(theta) has the following values wit...
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