Question

b) cosec 3π/2. (sen 315°+ tg 2π)​

Answer 1

pré parto:

sen 3π/2 = -1 => cosec 3π/2 = 1/-1= -1

sen 315= -sen(360-315)= -sen45= -√2/2

tg 2π = sen2π/cos2π = 0/1= 0

cosec 3π/2. (sen 315°+ tg 2π)=

-1. (-√2/2 + 0)

√2 /2 ✓