Question

1. Найти соотвествие:
А. sin⁡(x+y) ----------------------------------1. 2 sin⁡〖(x+y)/2〗 cos⁡〖(x-y)/2〗
Б. cos⁡(x+y)------------------------------------- 2. sin⁡x cos⁡y+cos⁡x sin⁡y
В. cos⁡(x-y)---------------------------------------3. cos^2 x-sin^2 x
Г. sin⁡(x-y) -------------------------------------- 4. 2 cos⁡〖(x+y)/2〗 cos⁡〖(x-y)/2〗
Д. sin⁡x+sin⁡y------------------------------------- 5. cos⁡x cos⁡y-sin⁡x sin⁡y
Е. sin⁡x-sin⁡y -------------------------------------- 6. cos⁡x cos⁡y+sin⁡x sin⁡y
Ж. cos⁡x-cos⁡y --------------------------------- 7. 2 sin⁡〖(x-y)/2〗 cos⁡〖(x+y)/2〗
З. cos⁡x+cos⁡y -------------------------------------8. 2sin⁡x cos⁡x
И.cos⁡2x --------------------------------------- 9.-2 sin⁡〖(x+y)/2〗 sin⁡〖(x-y)/2〗
К. sin⁡2x------------------------------------------ 10. sin⁡x cos⁡y-cos⁡x sin⁡y