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1129c<br />
cos64<br />
<br />
x<br />
=<br />
97<br />
( mult 97)<br />
<br />
97 ⋅ cos64 = 97 ⋅<br />
<br />
97cos64 = x<br />
<br />
x = 97cos64<br />
97cos(64)<br />
x = 43 cm<br />
x<br />
97<br />
1131a<br />
234<br />
cos38,7 = ( mult x)<br />
x<br />
234<br />
x⋅ cos38,7 = x ⋅<br />
x<br />
xcos38,7<br />
= 234 div<br />
<br />
( cos 38, 7 )<br />
<br />
x cos38,7<br />
cos38,7 <br />
234<br />
=<br />
<br />
cos38,7<br />
234<br />
x =<br />
<br />
cos38,7<br />
234 cos(38.7)<br />
x = 300 cm<br />
1138a<br />
17<br />
sin v =<br />
36<br />
−1<br />
⎛17 ⎞<br />
v = sin ⎜ ⎟<br />
⎝36 ⎠<br />
−1<br />
sin (17 36)<br />
v = 28<br />
<br />
1129d<br />
sin 49<br />
LÖSNINGAR DEL B<br />
<br />
x<br />
=<br />
67<br />
( mult 67)<br />
<br />
67 ⋅ sin 49 = 67 ⋅<br />
<br />
68sin 49 = x<br />
<br />
x = 68sin 49<br />
68sin(49)<br />
x = 51 cm<br />
1138b<br />
31<br />
cosv<br />
=<br />
52<br />
−1<br />
⎛31⎞ v = cos ⎜ ⎟<br />
⎝52 ⎠<br />
−1<br />
cos (31 52)<br />
v = 53<br />
<br />
x<br />
67<br />
1130a<br />
sin55<br />
<br />
x<br />
=<br />
72<br />
( mult 72)<br />
<br />
72⋅ sin55 = 72 ⋅<br />
<br />
72sin55 = x<br />
<br />
x = 72sin55<br />
72sin(55)<br />
x = 59 cm<br />
x<br />
72<br />
1131b<br />
15,1<br />
cos76,5 = ( mult x)<br />
x<br />
15,1<br />
x⋅ cos76,5 = x ⋅<br />
x<br />
xcos76,5<br />
= 15,1 div<br />
<br />
( cos 76, 5 )<br />
<br />
x cos76,5<br />
cos76,5 <br />
15,1<br />
=<br />
<br />
cos76,5<br />
15,1<br />
x =<br />
<br />
cos76,5<br />
15,1 cos(76.5)<br />
x = 64,7 cm<br />
1139a<br />
52<br />
sin v =<br />
65<br />
−1<br />
⎛52 ⎞<br />
v = sin ⎜ ⎟<br />
⎝65 ⎠<br />
−1<br />
sin (52 65)<br />
v = 53<br />
<br />
(tan eller cos går också bra)<br />
1130b<br />
x<br />
cos71 =<br />
39<br />
( mult 39)<br />
<br />
39⋅ cos71 = 39 ⋅<br />
<br />
39cos71 = x<br />
<br />
x = 39cos71<br />
39cos71<br />
x = 13 cm<br />
1139b<br />
51<br />
sin v =<br />
85<br />
−1<br />
⎛51⎞ v = sin ⎜ ⎟<br />
⎝85 ⎠<br />
−1<br />
sin (51 85)<br />
v = 37<br />
<br />
<br />
x<br />
39<br />
(tan eller cos går också bra)<br />
4
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