Question

Problem with posted pictures .Where does theta come from in the answer to problem #2 on the Final for 18.02?

Answer 1

Here is the Answer

Answer 2

Here is the problem.

Answer 3

The \[\theta \] I Speak of is for \[QP^{\rightarrow}\]

Answer 4

The vector QP has always a 45 degree angle with the horizontal. θ is the angle between vectors OA and OQ, and is used as a parameter. (It shows the angle of the vector from the origin to the point on which the tape is still attached to the roll