In \(\bigtriangleup\) XYZ, XY = 13cm, YZ = 9cm, XZ = 11cm and XYZ = \(\theta\). Find cos\(\theta\)o
a
\(\frac{4}{39}\)
b
\(\frac{43}{39}\)
c
\(\frac{209}{3}\)
d
\(\frac{43}{78}\)
Explanation
Correct Option
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