Discover Questions

This is picture of my angiography plz let me know according to this collateral circulation revealed? Quadrilateral ABCD with vertices? What's the name of the nearest galaxy to us that may have planets with living people on it? 5√2 -4√18 + √36 = 6-7√2. Can someone explain how this problem is done and why that's the answer? Need help to understand why this equation is different from the formulas given. Write each product as a sum or difference
1. cos(10x)sin(5x)?