Use the image to answer the question.
A waveform is graphed on a coordinate plane.
Write the equation of the function shown on the graph using cosine.
(1 point)
Responses
f(x)=3cos(x2)−2
f left parenthesis x right parenthesis equals 3 cosine left parenthesis Start Fraction x over 2 End Fraction right parenthesis minus 2
f(x)=3cos(x)−2
f left parenthesis x right parenthesis equals 3 cosine left parenthesis x right parenthesis minus 2
f(x)=2cos(x2)−2
f left parenthesis x right parenthesis equals 2 cosine left parenthesis Start Fraction x over 2 End Fraction right parenthesis minus 2
f(x)=3cos(x2)+1