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# Higher trig question watch

1. Good Morning TSR,

I would like help with this question :

I do not want the answer or any values, only a starting step as to work off.

Thank you!
2. (Original post by huraiyrah)
Good Morning TSR,

I would like help with this question :

I do not want the answer or any values, only a starting step as to work off.

Thank you!
Cosine rule, with sides of lengths depending on x.
3. (Original post by RDKGames)
Cosine rule, with sides of lengths depending on x.
cos(60) = (b^2 + c^2 - a^2) / (2bc)

would this be valid?
4. (Original post by huraiyrah)
cos(60) = (b^2 + c^2 - a^2) / (2bc)

would this be valid?
Yes

5. edit : solved

6. (Original post by huraiyrah)

edit : solved

This is correct well done

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