< Q = 30°
Jawab:
menggunakan aturan kosinus
PR² = PQ² + RQ² - 2 cos Q
2² = 4² + (2√3)² - 2(4)(2√3) cos Q
4 = 16 + 12 - 16√3 cos Q
16√3 cos Q = 16 + 12 - 4
16√3 cos Q = 24
cos Q = 24 / 16√3
cos Q = 3 / 2√3 rasionalkan
cos Q = 3√3 / 2√3√3
cos Q = 3√3 / 6
cos Q = 1/2 √3
Q = 30°
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< Q = 30°
Jawab:
menggunakan aturan kosinus
PR² = PQ² + RQ² - 2 cos Q
2² = 4² + (2√3)² - 2(4)(2√3) cos Q
4 = 16 + 12 - 16√3 cos Q
16√3 cos Q = 16 + 12 - 4
16√3 cos Q = 24
cos Q = 24 / 16√3
cos Q = 3 / 2√3 rasionalkan
cos Q = 3√3 / 2√3√3
cos Q = 3√3 / 6
cos Q = 1/2 √3
Q = 30°