Key Quiz 1.4
Key Quiz 1.4
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 1 Which of the following is a correct version of the cosine law? A) (17.0K) B) (16.0K) C) (17.0K) D) (20.0K) 2 Find the measure of the indicated side in the triangle shown to the nearest tenth of a km. (15.0K) A) 169.0 km B) 190.6 C) 260 km D) 28 569.8 km 3 Find the measure of the indicated angle in the triangle shown to the nearest degree. (15.0K) A) 25° B) 57° C) 60° D) 63° 4 A searchlight can shine a beam 750 m long. It can turn through an angle of 75°. (19.0K) What is the direct distance (to the nearest km) between the ends of the searchlight’s sweep? A) 195 m B) 521 m C) 913 m D) 990 m 5 A plane flying northeast is 125 km from its base. A radio report from the base reports a UFO 195 km due west of the base and 155 km away from the plane. (20.0K) How many degrees (to the nearest hundredth of a degree) does the plane have to turn to head toward the UFO to check it out A) 87.60° B) 85.19° C) 52.58° D) 39.82°

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