Hello Alan, Hi Andy, I am afraid my Terman "Radio Engineers Handbook" 1943 Page 19 gives Sin(A).Cos(B)= Sin(A-B)+Sin(A+B) ....if we forget about the 0.5 factor. But Andy took Cos(A)*Sin(B) instead of
Hi Andy, I am afraid my Terman "Radio Engineers Handbook" 1943 Page 19 gives Sin(A).Cos(B)= Sin(A-B)+Sin(A+B) ....if we forget about the 0.5 factor. but it agrees on the others. This gives you Cos(A-