The cosine rule is: \(a^2 = b^2 + c^2 - 2bc \cos{A}\) This version is used to calculate lengths. Calculate the length BC. Give the answer to three significant figures. Use the form \(a^2 = b^2 + c^2 - ...
\(\text{Area of a triangle} = \frac{1}{2} ab \sin{C}\) To calculate the area of any triangle the lengths of two sides and the angle in between are required. Rearrange the equation to make \(\sin{C}\) ...
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