Sheila is baking cakes for an upcoming fundraiser and needs 2 1/2 cups of sugar for each cake, if she has 8 1/3 cups of sugar, how many cakes can
she make. SHOW YOUR WORK!

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