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Law of Sines and Cosines

Law of Sines and Cosines. The Law of Sines and Cosines are two closely related topics covered in the Trigonometry section of Pre-Calculus. This PowerPoint presentation can be used as an introduction to the two topics. . Law of Sines. Enables you to solve a triangle if you know

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Law of Sines and Cosines

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  1. Law of Sines and Cosines The Law of Sines and Cosines are two closely related topics covered in the Trigonometry section of Pre-Calculus. This PowerPoint presentation can be used as an introduction to the two topics.

  2. Law of Sines Enables you to solve a triangle if you know • two angles and a side across from one of the angles • Two sides and one angle across from a given side

  3. Law of Cosines Enables you to solve a triangle if you know Two sides of a triangle and their included angle Once you have found the angle or side using the given information, revert back to Law Of Sines to complete task

  4. Things to Remember: • Pay attention to unit of measure given for angles (degrees versus radians) • If given three side lengths, determine if a triangle is even possible given these lengths • The ambiguous case – it is possible to have none, one, or two triangles • Check your work! Does it make sense!

  5. Success!

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