Question 95
Δ XYZ is right angled at Y. If m ∠Z = 60°. What is the length (in cm) of YZ, if ZX = 9√3 cm?
Solution
cos Z = x/9√3
cos 60° = x/9√3
1/2 = x/9√3
x = 9√3/2
So the answer is option C.
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