Question

Would you use Law of Sine or Law of Cosine to find the length of side CB? Explain your answer.

What is the measure of angle B? Please show your work and round your answer to the nearest whole degree.

Answer 1

To work out side CB, you would use the Side Cosine Rule to work out the length of a side that is opposite of an angle enclosed by the two other sides (angle A is enclosed between sides c and b).

To work out angle B, you would use the Angle Sine Rule::

theta (angle B) = sin^-1((440*sin57)/255)