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BBC4 年
Using the sine and cosine rules to find a side or angle in a triangle
Use this formula when given the sizes of two sides and its included angle.
BBC4 年
The cosine rule - Higher
This version is used to calculate lengths. Calculate the length BC. Give the answer to three significant figures. Use the form \(a^2 = b^2 + c^2 - 2bc \cos{A}\) to calculate the length. \(\text{BC} ...