Question

Determine a coordenada cartesiana do ponto P(5, -π/4) em coordenada polares.

A) (-5√2/2, -5√2/2)
B) (5/2, 5√3/2,)
C) (5√2/2, -5√2/2)
D) (-5√2/2, 5√2/2)
E) (5√3/2, -5/2)

Answer 1

Oi Cleo

P(5, -π/4)

x = p*cos(φ)
y = p*sen(φ)

x = 5*cos(-π/4) = 5√2/2
y = 5*sen(-π/4) = -5√2/2

alternativa C

Answer 2

A resposta é (5√2/2, ₋5√2/2)