Use the Law of Cosines to Solve the Given Triangle $$a = 11 , b = 15 , c = 21$$

question 47

Multiple Choice

Use the law of Cosines to solve the given triangle. Round your answer to two decimal places. $$a = 11 , b = 15 , c = 21$$

• A) \(\quad A \approx 43.16 ^ { \circ } , B \approx 43.16 ^ { \circ } , C \approx 93.68 ^ { \circ }\)
• B) \(A \approx 30.11 ^ { \circ } , B \approx 106.73 ^ { \circ } , C \approx 43.16 ^ { \circ }\)
• C) \(A \approx 43.16 ^ { \circ } , B \approx 30.11 ^ { \circ } , C \approx 106.73 ^ { \circ }\)
• D) \(A \approx 30.11 ^ { \circ } , B \approx 43.16 ^ { \circ } , C \approx 106.73 ^ { \circ }\)
• E) \(A \approx 106.73 ^ { \circ } , B \approx 43.16 ^ { \circ } , C \approx 30.11 ^ { \circ }\)

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Definitions:

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lines of best fit used in statistical analysis to represent the relationship between a dependent variable and one or more independent variables.

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A relationship in which one event (the cause) makes another event happen (the effect), often used in problem-solving and decision-making to identify the root causes of issues.

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Predictive models that establish relationships between variables, often used in forecasting and decision-making.

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