Respuesta :
tan x = 1 / cot x
so tanx * cot x = 1/cot x * cotx = 1
so 3 tanx cos x cotx = 3 cos x * 1 = 3 cos x
True
so tanx * cot x = 1/cot x * cotx = 1
so 3 tanx cos x cotx = 3 cos x * 1 = 3 cos x
True