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Ivan
2 years ago
9

Which expression gives the value of QR?

Mathematics
1 answer:
Montano1993 [528]2 years ago
8 0

Answer:

B

Step-by-step explanation:

using the Sine Rule in Δ QRS

\frac{QR}{sinS} = \frac{RS}{sinQ} ( substitute values )

\frac{QR}{sin52} = \frac{67}{sin80} ( cross- multiply )

QR × sin80° = 67 × sin52° ( divide both sides by sin80° )

QR = \frac{67sin52}{sin80}

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Answer:

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2 years ago
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