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IB Mathematics HL – Trigonometry, Cosine Rule

How can we solve the triangle using Cosine Rule given that , and .

Thanks

How can we solve the triangle using Cosine Rule given that , and .

Thanks

- Oliver
**Posts:**0**Joined:**Mon Jan 28, 2013 8:08 pm

IB Math HL – Trigonometry, Cosine Rule

Applying the Cosine Rule we have that

Now, in order to find another angle, for example , we could apply again cosine rule and solve for as following

Finally, for the angle we have that

Hope these help!!

Applying the Cosine Rule we have that

Now, in order to find another angle, for example , we could apply again cosine rule and solve for as following

Finally, for the angle we have that

Hope these help!!

- miranda
**Posts:**268**Joined:**Mon Jan 28, 2013 8:03 pm

Thank you miranda!!

- Oliver
**Posts:**0**Joined:**Mon Jan 28, 2013 8:08 pm

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