Question

if none of A,B,A+Bis an integral multiple of πthen prove that 1-cosA+cosB- cos(A+B)/1+cosA-cosB-cos(A+B)=tan A/2cotB/2​

Answer 1

Answer:

An ecosystem is a geographic area where plants, animals, and other organisms, as well as weather and landscape, work together to form a bubble of life. Ecosystems contain biotic or living, parts, as well as abiotic factors, or nonliving parts. Biotic factors include plants, animals, and other organisms.