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In $\bigtriangleup$ XYZ, determine the cosine of angle Z....

$In \(\bigtriangleup\)XYZ, determine the cosine of angle Z.$

In $\bigtriangleup$ XYZ, determine the cosine of angle Z.

A.

$\frac{3}{39}$

B.

$\frac{29}{36}$

C.

$\frac{14}{5}$

D.

$\frac{7}{5}$

View answer & explanation

Correct answer is B

cos z = $\frac{y^2 + x^2 -z^2}{2yx}$

= $\frac{9 + 36 - 16}{2(3)(6)}$

= $\frac{29}{36}$

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