25-04-2022
Mathematics

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Find QR.
Write your answer as an integer or as a decimal rounded to the nearest tenth.

Find QR Write your answer as an integer or as a decimal rounded to the nearest tenth class=

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jimrgrant1 jimrgrant1

25-04-2022

Answer:

QR ≈ 9.1

Step-by-step explanation:

using the cosine ratio in the right triangle

cos49° = [tex]\frac{adjacent}{hypotenuse}[/tex] = [tex]\frac{PR}{QR}[/tex] = [tex]\frac{6}{QR}[/tex] ( multiply both sides by QR )

QR × cos49° = 6 ( divide both sides by cos49° )

QR = [tex]\frac{6}{cos49}[/tex] ≈ 9.1 ( to the nearest tenth )

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