Question

What are the components of the vector between the origin and the polar coordinate `(2, (7pi)/8)`?

Answer 1

`x=rcostheta=2cos((7pi)/8)~~-1.85`
`y=rsintheta=2sin((7pi)/8)~~0.77`

Explanation:

Use the formula for changing from polar to rectangular as shown above and then substitute in r and `theta` and then calculate