Can someone please help me work out how to get to the answer of:
tanx + tan (pi-x) + cot (pi/2+x) = tan (2pi-x)
tan (pi-x) = -tan(x)
cot(pi/2+x) = -tan(x)
tan(2pi-x) = -tan(x)
now things fall out.
tanx + tan (pi-x) + cot (pi/2+x) = tan (2pi-x)
cot(pi/2+x) = -tan(x)
tan(2pi-x) = -tan(x)
now things fall out.