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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