Which OF THESE IS THE QUADRATIC PARENT FUNCTION!?! A. f(x)=x
B. f(x)2^×
C. f(x)=lxl
D. f(x)=x^2​

Which sum or difference identity would you use to verify that cos (180° - q) = -cos q? a.) sin (a -b) = sin a cos b – cos a sin b b.) cos (a -b) = cos a cos b – sin a sin b c.) cos (a -b) = cos a cosb + sin a sin b d.) sin (a + b) = sin a cos b + cos a sin b