10 points! find the product of z1 and z2, where z1 = 8(cos 40° + i sin 40°) and z2 = 4(cos 135° + i sin 135°). a) 32(cos 40° + i sin 40°) b) 12(cos 175° + i sin 175°) c) 32(cos 5400° + i sin 5400°) d) 32(cos 175° + i sin 175°)

Option D is correct.i.e.,

Step-by-step explanation:

Given:  and  

To find: Product of and

Using, Cos( A + B ) = CosA CosB - SinA SinB

and      Sin( A + B ) = SinA CosB + CosA SinB

Therefore, Option D is correct.i.e.,

6 on both sides and twelve on the top and the bottom

step-by-step explanation: