February 2019 1 37 Report
Diketahui titik P(4,2) , Q(3,5) , R(2,2). Sudut antara vektor PR dan PQ adalah α. Besar cos α adalah...
a. -4/5
b. 4/5
c. -1/10 √10
d. 2/25
e. 1/10 √10

Mohon bantuannya yaa^^
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