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Vadim26 [7]
3 years ago
11

Find QR.

Mathematics
1 answer:
Novosadov [1.4K]3 years ago
7 0

Answer:

Step-by-step explanation:

take 64 degree as reference angle

using cos rule

cos 64=adjacent/hypotemuse

0.43=QR/10

10*0.43=QR

4.3=QR

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