Page 120 - Math SL HB Sem 1
P. 120
CIRC]ULAII FUNCTIONS ANI) TRIGONOMETITY
Example 5: From a point A, the summits of two mountains, B and C, are on
bearings of 024 ' 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 of B,
Calculate
(a) the horizontal distance from B to A
(b) the height ofC above A
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