3 years ago

Please answer correctly !!!!! Will mark Brianliest !!!!!!!!!!!!!!

Mathematics

1 answer:

docker41 [41]3 years ago

5 0

Answer:

∠ R ≈ 39°

Step-by-step explanation:

Using the cosine ratio in the right triangle

cos R = $\frac{adjacent}{hypotenuse}$ = $\frac{RS}{QR}$ = $\frac{61}{78}$ , then

∠ R = $cos^{-1}$ ( $\frac{61}{78}$ ) ≈ 39° ( to the nearest degree )

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