Using the Graph, identify the parent function, write an equation then translate 4 units down and 3 to the left

then vertically stretch by a factor of 2, then translate 5 units left

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