September 2018 1 145 Report
Jika diketahui panjang vektor a = \sqrt{6} , (â-î) (â+î)= 0 dan â(â-î)=3
maka besar sudut antara â dan î adalah.
a. \frac{ \pi }{3}
b.  \frac{ \pi }{4}
c. \frac{ \pi }{6}
d.  \frac{ \pi }{2}
e. \frac{ 2\pi }{3}

tolong dibantu yaa dibantu :)

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