The diagram shows a triangle ABC with AC = 6 cm, BC = 8 cm, angle BAC = 60° and angle ABC = 𝛾. Find the exact value of sin𝛾, simplifying your answer.
Question
The diagram shows a triangle ABC with AC = 6 cm, BC = 8 cm, angle BAC = 60° and angle ABC = 𝛾. Find the exact value of sin𝛾, simplifying your answer.
Solution
To find the exact value of sin𝛾, we can use the Law of Sines. The Law of Sines states that the ratio of the length of a side of a triangle to the sine of the angle opposite that side is the same for all three sides of the triangle.
Here's how we can apply it:
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We know that AC = 6 cm, BC = 8 cm, and ∠BAC = 60°. We want to find sin𝛾 where 𝛾 is ∠ABC.
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According to the Law of Sines, we have:
(BC/sin∠BAC) = (AC/sin∠ABC)
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Substituting the given values, we get:
(8/sin60°) = (6/sin𝛾)
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Simplifying the left side (since sin60° = √3/2), we get:
(8/(√3/2)) = (6/sin𝛾)
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Further simplifying, we get:
(16/√3) = (6/sin𝛾)
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Cross-multiplying to solve for sin𝛾, we get:
sin𝛾 = 6*(√3/16)
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Simplifying, we get:
sin𝛾 = √3/8
So, the exact value of sin𝛾 is √3/8.
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