In: Math
For the following exercises, find z1 z2 in polar form.
Consider two complex numbers as follows,
z1 = 3∙cis(π/4) and z2 = 5∙cis(π/6)
Use the formula for the multiplication of two complex numbers,
z1z1 = r1r2[cos(θ1 + θ2) + sin(θ1 + θ2)]
Substitute r1 = 3, r2 = 5, θ1 = π/4 and θ2 = π/6, the multiplication of above complex numbers will be,
z1z1 = 3 × 5 ×[cos(π/4 + π/6) + sin(π/4 + π/6)]
= 15 × [cos(5π/12) + sin(5π/12)]
Therefore, the multiplication of above complex numbers is z1z2 = 15∙(5π/12).
Therefore, the multiplication of above complex numbers is z1z2 = 15∙(5π/12).