Question

Find a ⋅ b.

a = 9i + 5j, b = 4i + 3j

@agent0smith i got <36,15> but i think i'm wrong

Answer 1

it 's a cartsiemn form you want it's polar ?
well in that case a =10.29
b=5

Answer 2

You have to add them, remember? :)

Answer 3

Multiply the components, as you did, and add the results

Answer 4

@agent0smith you are officially my god lolol