cos 45° / sec30°+csc 30°
Matematika
anggi1108
Pertanyaan
cos 45° / sec30°+csc 30°
1 Jawaban
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1. Jawaban Anonyme
Kelas 10 Matematika
Bab Trigonometri
cos 45° / (sec 30° + cosec 30°)
= (1/2 √2) / (2/3 √3 + 2)
= (1/2 √2) / (2 + 6)/3
= (3√2)/(4 + √6) . (4 - √6)/(4 - √6)
= (12√2 - 3√12)/(4² - √6²)
= (12√2 - 3 . 2√3)/(16 - 6)
= (12√2 - 6√3)/10
= (6√2 - 3√2)/5