3 A ladder 13 m long reaches a window 12 m high. What is the angle of elevation of the ladder? A sin⁻¹(12/13) B cos⁻¹(12/13) C tan⁻¹(12/13) D tan⁻¹(13/12)
9 If the sector angle is 120° and radius is 9 cm, what is the arc length? A 6π cm B 3π cm C 12π cm D 18π cm
16 From the top of a cliff 50 m high, the angle of depression of a boat is 30°. How far is the boat from the base of the cliff? A 50√3 m B 50/√3 m C 100 m D 25 m
17 A man walks 5 km due North and then 5 km due East. What is his bearing from the starting point? A 045° B 135° C 315° D 225°
18 Which operation should be done first to solve √(x+2) = 3? A Add 2 B Square both sides C Subtract 2 D Divide by 3
20 What is the sector angle of a circle if the arc length is 10 cm and the radius is 5 cm? A 2 radians B 0.5 radians C 50 radians D 15 radians