mohon di jawab ya teman-teman

________
x = \/ 6^2 - 4^2
______
= \/ 36 - 16
___ ___
=\/ 20. = 2 \/ 10

Bab Trigonometri
Matematika SMA Kelas XI

aturan cosinus
x = √(4² + 6² - 2 . 4 . 6 cos 60°)
x = √(16 + 36 - 48 . 1/2)
x = √(52 - 24)
x = √28
x = 2√7 cm

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