Half-Angle Formulas 1 + cos u I COS U sin = 2 2 COS I sin u tan 2 sin u 1 + cos u " 2 The signs of sin and cos depend on the quadrant in which lies. Question 6 3 = 4 Suppose is an angle such that cos(0) - If 0 <0 If 2 < <3, 0 then cos = 2 and sin = 2 Question Help: Message instructor 0.33/2 pts 395 Details