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To find an unknown angle:

cosA= b2+c2-a2

              2bc

To find an unknown length:

a2=b2+c2-2bc cosA

Natalie H. A Level Business Studies tutor, GCSE Business Studies tuto...

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Silje I.

Degree: Economics (Masters) - Warwick University

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“Hi! My name is Silje Indrebo and I am currently completing a Master's degree in economics at University of Warwick. Before coming to Warwick I graduated with a Bachelor's degree in economics from UC Berkeley. Interests: I have alway...”

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Degree: Biochemistry (Bachelors) - Oxford, St Anne's College University

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Degree: MPhil Modern Middle Eastern Studies (Masters) - Oxford, St Antony's College University

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Natalie H.

Degree: Modern Languages (Bachelors) - Exeter University

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