Question

Find the magnitude and direction angle of:

v=7(cos100°i+sin100°j)

Answer 1

normally, a complex number would be written as
cos A + i sin A

but you have i multiplying the cosine. Is that correct ?

Answer 2

yes

Answer 3

its a vector

Answer 4

the magnitude and direction are already given inthe setup

Answer 5

cos(100) , sin(100) already has a magnitude of 1 as a result of the unit circle; so mutlipy that by 7 just gets us 7

the direction is the angle provided ....

Answer 6

thanks!

Answer 7

oh... I did not see the j hiding next to the sin.

Answer 8

do the magnitude it 7 and direction angle is 100 right?

Answer 9

so*

Answer 10

yes, mag 7, direction 100º