- #1
songoku
- 2,328
- 337
- Homework Statement
- Please see below
- Relevant Equations
- Not really sure
My attempt:
$$|\vec{BA} -\lambda \vec {BC}| \geq 2|\vec {BC}|$$
$$|\vec {BA}|^2 -2 \lambda (\vec {BA} \cdot \vec {BC}) +\lambda ^{2} |\vec {BC}|^2 \geq 4|\vec {BC}|^2$$
$$|\vec {BA}|^2 -2 \lambda |\vec {BA}| \cos \theta +\lambda ^{2} \geq 4$$
Am I even on the right track?
Thanks