Rewrite the sine function f(x)=2sin(x+π2)−1 as a cosine function.(1 point)
Responses
f(x)=2cos(x+π)−1
f left parenthesis x right parenthesis equals 2 cosine left parenthesis x plus pi right parenthesis minus 1
f(x)=2cos(x+π4)−1
f left parenthesis x right parenthesis equals 2 cosine left parenthesis x plus Start Fraction pi over 4 End Fraction right parenthesis minus 1
f(x)=2cos(x−π2)−1
f left parenthesis x right parenthesis equals 2 cosine left parenthesis x minus Start Fraction pi over 2 End Fraction right parenthesis minus 1
f(x)=2cos(x)−1
f left parenthesis x right parenthesis equals 2 cosine left parenthesis x right parenthesis minus 1