Question

Please help me worth 18 points

Answer 1

B

Explanation:

`1)\cos\ Q = (PQ)/(QR) = (√(7))/(5)`

`2)\ PQ = 2XY, PQR\ and\ XYZ\ - similar\ =>\ RQ = 2YZ\ and\ PR = 2XZ`

`3)\ Sin\ Z = (XY)/(YZ) = ((PQ)/(2))/((QR)/(2)) = (PQ)/(QR) = (√(7))/(5)`

`Answer: \ (√(7))/(5)`