Select the correct answer. What is the solution to the equation? ​

This is different from the first one can someone me

Evaluate cos2θ for cosθ = square root of 3/2

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.