三角函數速度戰飲料爭奪戰
Flashcard
•
Mathematics
•
9th Grade
•
Practice Problem
•
Hard
Wayground Content
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15 questions
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1.
FLASHCARD QUESTION
Front
什麼是三角函數?
Back
三角函數是描述角度與三角形邊長之間關係的函數,主要包括正弦(sin)、餘弦(cos)和正切(tan)。
2.
FLASHCARD QUESTION
Front
正弦函數的定義是什麼?
Back
正弦函數是指在一個直角三角形中,對於一個角度A,正弦值等於對邊的長度除以斜邊的長度,即 sinA = 對邊/斜邊。
3.
FLASHCARD QUESTION
Front
餘弦函數的定義是什麼?
Back
餘弦函數是指在一個直角三角形中,對於一個角度A,餘弦值等於鄰邊的長度除以斜邊的長度,即 cosA = 鄰邊/斜邊。
4.
FLASHCARD QUESTION
Front
正切函數的定義是什麼?
Back
正切函數是指在一個直角三角形中,對於一個角度A,正切值等於對邊的長度除以鄰邊的長度,即 tanA = 對邊/鄰邊。
5.
FLASHCARD QUESTION
Front
三角函數的周期性是什麼?
Back
三角函數的周期性是指三角函數的值會隨著角度的增加而重複,正弦和餘弦函數的周期為360度或2π弧度,正切函數的周期為180度或π弧度。
6.
FLASHCARD QUESTION
Front
如何計算sin30°?
Back
sin30° = 1/2。
7.
FLASHCARD QUESTION
Front
如何計算cos60°?
Back
cos60° = 1/2。
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