Tommy bought 3 cups of blueberries. He will eat 1.2 cup of blueberries each day. How many day can Tommy eat the blueberries before they are gone?

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