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In this video, you will learn about the Law of Cosines.

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What is the Law of Cosines?

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For any triangle with sides of length a, b, and c, and angle C opposite side c, the Law of Cosines states that $c^2 = a^2 + b^2 + 2ab\cos(C)$.

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For any triangle with sides of length a, b, and c, and angle C opposite side c, the Law of Cosines states that $c = a + b - 2\cos(C)$.

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For any triangle with sides of length a, b, and c, and angle C opposite side c, the Law of Cosines states that $c^2 = a^2 + b^2 - 2ab\cos(C)$.

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For any triangle with sides of length a, b, and c, and angle C opposite side c, the Law of Cosines states that $c = a \cdot b \cdot 2\cos(C)$.

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