Page 120 - Math SL HB Sem 1
P. 120
(]IRCULAR FUNCl'IONS AND TRIGONOMETRY
Example 5: From a point A, the summits of two mountains, B and C, are on
bearings o1024 " and 058 " , and the angles of elevation are 8.5 " and
9.3 " respectively. If B is 850 m above A, and C is due east ol B,
Calculate
(a) the horizontal distance from B to A
(b) the height olC above A
4-45
