Question

Find the cosine of ∠I.

Answer 1

Answer:

$\sqrt{\frac{3}{5} } .$

Step-by-step explanation:

1) cos(I)=IH/IG;

$2) \ IG=\sqrt{IH^2+GH^2} =10;$

$3) \ cos(I)=\frac{2\sqrt{15}}{10}=\frac{\sqrt{15}}{5}=\sqrt{\frac{3}{5}}.$