Question

1. choose the correct answer if jk = 3 cm. use the value $s_2 = 6.2$ find $cos j$. $\frac{3}{7} \approx 0.4$ $\frac{6.2}{3} \approx 2.1$ $\frac{3}{6.2} \approx 0.5$ $\frac{6.2}{7} \approx 0.9$

Explanation:

Step1: Recall cosine definition for angle J

For right triangle $\triangle JKL$ (right-angled at $K$), $\cos J = \frac{\text{Adjacent side to } J}{\text{Hypotenuse}}$

Step2: Identify relevant sides

Adjacent side to $J$ is $JK = 3$ cm, hypotenuse is $JL = 7$ cm.

Step3: Calculate $\cos J$

$\cos J = \frac{JK}{JL} = \frac{3}{7} \approx 0.4$

Answer:

$\frac{3}{7} \approx 0.4$