2 years ago

Which expression gives the value of QR?

Mathematics

1 answer:

Montano1993 [528]2 years ago

8 0

Answer:

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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