sin (7x – 1/3 π) = 1/2
Himpunan penyelesaian dari sin (7x – 1/3 π) = 1/2 untuk 0 ≤ x ≤ 2π adalah ….
A. {1/14 π, 1/6 π, 5/14 π, 17/42 π, 19/42 π, 9/14 π, 31/42 π, 13/14 π, 41/42 π, 17/14 π, 55/42 π, 3/2 π, 73/42 π, 79/42 π}
B. {1/14 π, 5/42 π, 5/14 π, 19/42 π, 9/14 π, 31/42 π, 13/14 π, 41/42 π, 17/14 π, 55/42 π, 3/2 π, 69/42 π, 73/42 π, 79/42 π}
C. {1/14 π, 1/6 π, 5/14 π, 17/42 π, 9/14 π, 31/42 π, 13/14 π, 41/42 π, 17/14 π, 55/42 π, 3/2 π, 67/42 π, 25/14 π, 79/42 π}
D. {1/14 π, 5/42 π, 5/14 π, 17/42 π, 9/14 π, 31/42 π, 13/14 π, 43/42 π, 17/14 π, 55/42 π, 3/2 π, 67/42 π, 25/14 π, 79/42 π}
E. {1/14 π, 1/6 π, 5/14 π, 19/42 π, 9/14 π, 31/42 π, 13/14 π, 43/42 π, 17/14 π, 55/42 π, 3/2 π, 67/42 π, 25/14 π, 79/42 π}
Pembahasan:
sin (7x – 1/3 π) = 1/2 = sin 1/6 π, sehingga diperoleh:
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