Question

Could some one help me with vector 5?

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Answer 1

Use the form:

`v = rcos(theta)hati + rsin(theta)hatj`

where `r` is the magnitude and `theta` is the angle with respect to positive x axis.

We are given that `r = 17` and `theta = 105^@`

`vecv = 17cos(105^@)hati+ 17sin(105^@)hatj`

Using a calculator and rounding to 1 decimal place:

`vecv = -4.4hati+ 16.4hatj`