3.แบบทดสอบ เรื่อง ตรีโกณมิติ ม.3
Flashcard
•
Mathematics
•
9th Grade
•
Practice Problem
•
Hard
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1.
FLASHCARD QUESTION
Front
ค่าของ x จากสมการ cot²30°-2xsec60° +tan²45° = 0
Back
x = 1
2.
FLASHCARD QUESTION
Front
ข้อใดกล่าวถูกต้อง: sin27° < sin 43° หรือ sin27° > sin 43° หรือ cos0° < sin60° หรือ cos0° < cos89°
Back
sin27° < sin 43°
3.
FLASHCARD QUESTION
Front
สามเหลี่ยม ABC มีมุม A=45 ° มุมC = 60° มีด้าน BC ยาวเท่ากับ 2 หน่วย ลาก B มาตั้งฉากกับ AC ที่ D จงหา พื้นที่ของสามเหลี่ยม ABC
Back
(3+√3)/2
4.
FLASHCARD QUESTION
Front
ถ้า B = 30° และ C = 60° แล้วค่าของ (3cosCsinB)/(cos²B+2-sin²C) เท่ากับข้อใด
Back
3/8
5.
FLASHCARD QUESTION
Front
ข้อใดไม่เป็นเอกลักษณ์ตรีโกณมิติ: sin²A+cos²A = 1 หรือ 1+tan²A = sec²A หรือ secA⋅cosB = 1 หรือ cosecA⋅sinA-1 =0
Back
secA⋅cosB = 1
6.
FLASHCARD QUESTION
Front
sinA + cosA = ?
Back
√2 sin(A + 45°) (สูตรการรวมมุม)
7.
FLASHCARD QUESTION
Front
tanA = ?
Back
sinA/cosA (นิยามของแทนเจนต์)
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