Complete the left-hand column of the table below following the steps indicated in the right-hand column to show that sin a sin b=1/2[cos(a-b)-cos(a+b)] is an identity. use the definitions of sum and difference formulas for cosine.

Meghan has created a diagram of her city with her house, school, store, and gym identified. a. how far is it from the gym to the store? b. meghan also wants to walk to get some exercise, rather than going to the gym. she decides to walk along arc ab. how far will she walk? round to 3 decimal places.