Jawabanmu

2014-03-27T18:38:32+07:00
2014-03-27T18:56:04+07:00
Dari cos β = 3/4, didapat x = 3 dan r = 4 maka y  \sqrt[]{  r^{2} - x^{2} }
y =  \sqrt{ 4^{2} -  3^{2}  }
y =  \sqrt{16 - 9}
y =  \sqrt{7}
tan β = y/x =  \sqrt{7}/3