Verified Answer :

The law of cosines :

A^2 = B^2 + C^2 - 2BC cos A

2^2 = 3^2 + 4^2 -  2 . 3. 4 cos theta

= 21

hope this helps

After
using the law of cosines to find the value of 234 cos theta, I’ve come
up that the answer is 21. I am hoping that this answer has satisfied
your query about this specific question, thank you and have a nice day.

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