- #1

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- 302

- 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