Question

The angle of elevation from tammy to the helicopter is 12 degrees. tammy and rusty are 700 meters apart. if tammy is 400 meters from the helicopter, how much distance is there between the rusty and the helicopter?.
a. 146 meters.
b. 320 meters.
c. 574 meters.
d. 806 meters

Answer 1

We will use the Cosine Law:
x² = 700² + 400² - 2 · 700 · 400 · cos 12°
x² = 490,000 + 160,000 - 560,000· 0.9781476
x² = 490,000 + 160,000 - 547,762.35
x² = 102,237.35
x =√102,237.35 = 319.75 ≈ 320 m
Answer: B ) 320 meters.