What is the Law of Cosines formula?
Law of Sines and Cosines Review

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•
Mathematics
•
9th - 12th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
c² = a² + b² - 2ab cos(C)
2.
FLASHCARD QUESTION
Front
How do you find angle Z using the Law of Sines?
Back
Use the formula: \( \frac{\sin A}{a} = \frac{\sin Z}{z} \) and solve for Z.
3.
FLASHCARD QUESTION
Front
What is the Law of Sines formula?
Back
\( \frac{a}{\sin A} = \frac{b}{\sin B} = \frac{c}{\sin C} \)
4.
FLASHCARD QUESTION
Front
How do you find side c using the Law of Sines?
Back
Use the formula: \( \frac{\sin 41}{19} = \frac{\sin 75}{c} \) and solve for c.
5.
FLASHCARD QUESTION
Front
What is the relationship between the sides and angles in a triangle according to the Law of Sines?
Back
The ratio of a side length to the sine of its opposite angle is constant for all three sides.
6.
FLASHCARD QUESTION
Front
What is the purpose of the Law of Cosines?
Back
To find a side or angle in a triangle when two sides and the included angle are known, or when all three sides are known.
7.
FLASHCARD QUESTION
Front
How do you find angle A using the Law of Sines?
Back
Use the formula: \( \frac{\sin 44}{26} = \frac{\sin A}{23} \) and solve for A.
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