Question

Please help me asap!!

Kirra camped overnight at point A beside a river that ran east-west. She walked on a bearing of 065° for 18 km to point B.

Answer 1

Check the picture below.

a)

what angle? well, is just the complementary angle to 65°.

b)

`\cos(65^o )=\cfrac{\stackrel{adjacent}{x}}{\underset{hypotenuse}{18}} \implies 18\cos(65^o)=x \implies 7.61\approx x`

Make sure your calculator is in Degree mode.