cos2x=0.4
2tan3x=-4
三角學 數學高手 請列式
2012-05-26 6:26 pm
回答 (4)
2012-05-27 12:34 am
✔ 最佳答案
1.COS2X=0.42X=66.42182152或293.25781785或426.4218215或653.2578179
X=33.2,146.6,213.2,326.6
(2x=轉多1個圏)
2.2tan3x= -4
3x=296.6, 116.6, 656.6, 476.6, 1016.6, 836.6
x=98.9, 38.9, 218.9, 158.9 , 338.9 , 278.9
(3X=轉多2個圏)
參考: ME
2012-06-02 8:28 pm
cos2x=0.4
2x=66.4 or 2x=360-66.4
x=33.2 or x=146.8
2tan3x=-4
tan3x=-2
3x=-63.4 or 3x=180-63.4
x=98.9 or x=38.9
2x=66.4 or 2x=360-66.4
x=33.2 or x=146.8
2tan3x=-4
tan3x=-2
3x=-63.4 or 3x=180-63.4
x=98.9 or x=38.9
2012-05-27 5:25 am
有冇講明x既範圍係0至360?
2012-05-27 2:36 am
請問係唔係聯立方程黎架?
收錄日期: 2021-04-13 18:42:23
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