math test chapter 5

• sin(u+v) = sin(u)cos(v)+cos(u)sin(v)
• sin(u-v) = sin(u)cos(v)-cos(u)sin(v)
• cos(u+v) = cos(u)cos(v)-sin(u)sin(v)
• cos(u-v) = cos(u)cos(v)+sin(u)sin(v)
• tan(u+v) = tan(u)+tan(v)/1-tan(u)tan(v)
• tan(u-v) = tan(u)-tan(v)/1+tan(u)tan(v)
• sin (u/2)=+or-sqrt(1-cosu)/2
• cos(u/2)= +or-sqrt(1+cosu/2)
• tan(u/2)= (1-cosu/sinu)=(sinu/1+cosu)