Jawabanmu

2014-03-06T16:50:09+07:00
R(  30^{o} ) = [ (cos  30^{o} - sin  30^{o} ) ]
= (1/2√3 - 1/2)^2
= 3/4 - 1/2√3 + 1/4


(1/2√3 - 1/2)^2 = 3/4 - 1/2√3 - 1/4. ada gak jawabannya
ralat 3/4 - 1/2√3 + 1/4
gak ada, ada.nya, A.2-√3 B.1-√3 C.1 D.1/2(2-√3) E.1/2(2+√3)
jawabannya D
aku sederhanain ya...
jadi 4/4 - 1/2√3 = 1 - 1/2√3 = 2/2 - 1/2√3 = 1/2 (2-√3)
thank you very much