Allie and Beth are driving to meet up. Allie starts at mile marker 3 on the interstate and travel 60 miles per hour. Beth starts at mile marker 503 traveling 60 miles per hour. They will meet in HOW MANY HOURS

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