標題:
The equation sin x =0.5
發問:
最佳解答:
For 0° < x < 180° sinx = 0.5 sinx = 0.5 or sin(180° - x) = 0.5 x = 30° or 180° - x = 30° x = 30° or 150° Therefore, the equation has 2 roots. So the answer is C.
其他解答:
The equation sin x =0.5
發問:
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The equation sin x =0.5 has n roots for 0<180. Then n=? A 0 B 1 C 2 D 3最佳解答:
For 0° < x < 180° sinx = 0.5 sinx = 0.5 or sin(180° - x) = 0.5 x = 30° or 180° - x = 30° x = 30° or 150° Therefore, the equation has 2 roots. So the answer is C.
其他解答:
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