Mrs. Kurth is redesigning her backyard garden, if she would like the area of her current garden to increase from an area of 4th to 16th, then by what scale factor should she increase its dimensions

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