Answers

2016-02-03T22:15:44+05:30
Cos(40+x)=sin 30
sin(90-(40+x))=sin 30
sin(50-x)=sin 30
sin50-sin30=sin x
sin20=sinx
.'. x=20°
0
2016-02-03T22:27:11+05:30

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Cos(40+x)=sin30
sin(90-(40+x))=sin30
sin(50-x)=sin30
50-x=30
x=20
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