Question

４月から高専生

この問題の解法がわからないので、教えて欲しいです

1. 三角関数表を用いて, 図の x, y を求めよ.
(1)
32°
IC
(2)
3
y
4
57°
y
C

三角関数表
付表 267
角
sin
COS
tan
角
0°
0.0000
1.0000
sin
1234567
0.0175
0.9998
0.0000
COS
2°
0.0349
0.9994
0.0175
45°
3°
0.0523
0.0349
46°
0.7071
tan
0.9986
4°
0.0698
0.9976
0.0524
47°
0.7193
0.7071
5°
0.0872
0.9962
0.0699
48°
0.7314
0.6947
1.0000
0.7431
0.6820
1.0355
49°
0.0875
0.7547
0.6691
1.0724
0.1045
50°
0.9945
0.1219
0.1051
0.7660
0.6561
1.1106
0.9925
51°
0.6428
1.1504
8°
0.1392
0.1228
0.7771
1.1918
0.9903
52°
9°
0.1564
0.1405
0.7880
0.6293
0.9877
53°
10°
0.1736
0.1584
0.7986
0.6157
1.2349
1.2799
0.9848
0.1763
54° 0.8090
0.6018
1.3270
11°
0.1908
55°
0.5878
0.9816
0.8192
1.3764
12°
0.1944
0.5736
0.2079
0.9781
56°
1.4281
13°
0.2126
0.8290
0.5592
0.2250
0.9744
57°
0.8387
1.4826
14°
0.2309
0.5446
0.2419
58°
0.9703
0.8480
1.5399
0.2493
0.5299
15°
0.2588
59°
1.6003
0.9659
0.8572
0.2679
0.5150
16°
60° 0.8660
1.6643
0.2756
0.5000
0.9613
1.7321
0.2867
61°
17°
0.2924
0.8746
0.9563
0.4848
0.3057
1.8040
62°
18°
0.8829
0.3090
0.4695
0.9511
1.8807
0.3249
63°
0.8910
19°
0.3256
0.4540
1.9626
0.9455
0.3443
64°
0.8988
0.4384
20°
0.3420
2.0503
0.9397
0.3640
65°
0.9063
0.4226
2.1445
21°
0.3584
0.9336
0.3839
66°
0.9135
0.4067
2.2460
22°
0.3746
0.9272
0.4040
67°
0.9205
0.3907
2.3559
23°
0.3907
0.9205
0.4245
68°
0.9272
0.3746
2.4751
24°
0.4067
0.9135
0.4452
69°
0.9336
0.3584
2.6051
25°
0.4226
0.9063
0.4663
70°
0.9397
0.3420
2.7475
26°
0.4384
0.8988
0.4877
71°
0.9455
0.3256
2.9042
27°
0.4540
0.8910
0.5095
72°
0.9511
0.3090
3.0777
28°
'0.4695
0.8829
0.5317
73°
0.9563
0.2924
3.2709
29°
0.4848
0.8746
0.5543
74°
0.9613
0.2756
3.4874
30°
0.5000
0.8660
0.5774
75°
0.9659
0.2588
3.7321
31°
0.5150
0.8572
0.6009
76°
0.9703
0.2419
4.0108
32°
0.5299
0.8480
0.6249
77°
0.9744
0.2250
4.3315
33°
0.5446
0.8387
0.6494
78°
0.9781
0.2079
4.7046
34°
0.5592
0.8290
0.6745
79°
0.9816
0.1908
5.1446
35°
0.5736
0.8192
0.7002
80° 0.9848
0.1736
5.6713
36°
0.5878
0.8090
0.7265
81°
0.9877
0.1564
6.3138
37°
0.6018
0.7986
0.7536
82° 0.9903
0.1392
7.1154
38°
0.6157
0.7880
0.7813
83° 0.9925
0.1219
8.1443
39°
0.6293
0.7771
0.8098
84°
0.9945
0.1045
9.5144
40°
0.6428
0.7660
0.8391
85° 0.9962
0.0872
11.4301
41°
0.6561
0.7547
0.8693
86°
0.9976
0.0698
14.3007
42°
0.6691
0.7431
0.9004
87°
0.9986
0.0523
19.0811
88°
0.9994
0.0349
28.6363
43°
0.6820
0.7314
0.9325
0.0175
57.2900
44°
0.6947
0.7193
0.9657
89°
0.9998
90°
1.0000
0.0000
45°
0.7071
0.7071
1.0000

三角比