1. For ABC, what is the value of cosC?

(1 point)
0.5
0.6
0.8
0.9
2. A right triangle’s hypotenuse is 20 cm long. What is the length of the side opposite a 60° angle? Give your answer to the nearest tenth of a centimeter. (1 point)
40
18.5
20
17.3
3. A right triangle’s legs are 3 and 4 meters long. What is the measure of the angle adjacent to the 4-meter leg to the nearest tenth of a degree? (1 point)
35.9°
36°
36.9°
37.5°

Question

1.   For ABC, what is the value of cosC?

  (1 point)
0.5
0.6
0.8
0.9
2.   A right triangle’s hypotenuse is 20 cm long. What is the length of the side opposite a 60° angle? Give your answer to the nearest tenth of a centimeter.  (1 point)
40
18.5
20
17.3
3.   A right triangle’s legs are 3 and 4 meters long. What is the measure of the angle adjacent to the 4-meter leg to the nearest tenth of a degree?  (1 point)
35.9°
36°
36.9°
37.5°

anonymous · Answer

attachment

anonymous · Answer

1. cosine formula $$(\cos C = a^2+b^2 - c^2)/2ab$$
a,b,c are the length of the sides opposite to respective vertices (ANS. 0.8)

anonymous · Answer

thanks

anonymous · Answer

Use phytogorean therom to find missing side n.
 Then   cos c= n/90 

For q1

anonymous · Answer

2

20 sin 60 be sure to be in degree mode not radians

anonymous · Answer

so it 20

anonymous · Answer

20*sin(60) which is roughly 6.1

anonymous · Answer

17.3 oops sorry i was in radians not degrees lol I even warned you about it :P

anonymous · Answer

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36.9