請問以下的答案是怎樣做出來

2008-06-12 6:50 am
請問以下的答案是怎樣做出來, 先謝!

1.414 + j 1.414 = 2 ∠45 ???
更新1:

這是一個由 Trigonometric Form 轉去 Magnitude and Angle Form...

回答 (2)

2008-06-12 3:17 pm
✔ 最佳答案
This means x =1.414 = sqrt2. y = 1.414 = sqrt2. Therefore, angle = arc tan (sqrt2/sqrt2) = arctan(1) = 45. Distance from origin = sqrt[(sqrt2)^2 + (sqrt2)^2] =2.
Therefore, answer is 2 angle 45.
2008-06-12 6:54 am
你個條咩黎架=="
你係咪cos或sin45度相加等於2cos,sin45度呀?


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