September 2018 1 50 Report
Diketahui limas segitiga beraturan T.ABC dengan rusuk 8 cm. Nilai kosinus sudut antara garis TC dengan bidang ABC adalah....
A. \frac{1}{6} \sqrt{3}
B.  \frac{1}{3} \sqrt{2}
C.  \frac{1}{3} \sqrt{3}
D.  \frac{1}{2} \sqrt{2}
E.  \frac{1}{2} \sqrt{3}

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