Jawaban:
sin 2a = (n² - 1)/n²
Penjelasan dengan langkah-langkah:
sin 2a = 2 sin a. cos a
(sin a - cos a) = 1/n
(sin a - cos a)² = 1/n²
sin²a + cos²a - 2sin a.cos a = 1/n²
1 - 2sin a. cos a = 1/n²
1 - sin 2a = 1/n²
sin 2a = 1 - 1/n²
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Verified answer
Jawaban:
sin 2a = (n² - 1)/n²
Penjelasan dengan langkah-langkah:
sin 2a = 2 sin a. cos a
(sin a - cos a) = 1/n
(sin a - cos a)² = 1/n²
sin²a + cos²a - 2sin a.cos a = 1/n²
1 - 2sin a. cos a = 1/n²
1 - sin 2a = 1/n²
sin 2a = 1 - 1/n²
sin 2a = (n² - 1)/n²