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Part 1 of 5
Use the diagram to show that for the acute angle x", cos (180-x)=-Hint Apply the Law of Cosines to AABD, and write an equation involving
cos (180°-x) Then, for AABC, use the relationship a² +6²-2²
Apply the Law of Cosines to AABO, and write an equation involving cos (180°-x)
-²²-2ac cos (180°-x)
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Part 1 of 5 Use the diagram to show that for the acute angle x cos 180xHint Apply the Law of Cosines to AABD and write an equation involving cos 180x Then for A class=


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