3.ตรีโกณมิติ

3.ตรีโกณมิติ

KG

25 Qs

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3.ตรีโกณมิติ

3.ตรีโกณมิติ

Assessment

Quiz

Mathematics

KG

Practice Problem

Medium

Created by

supol nilklang

Used 111+ times

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25 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

กำหนดΔABC เป็นΔมุมฉากมีมุมBเป็นมุมฉากจงพิจารณา

ก.cosec A =sec C

ข.tan C = cot A

ถูกทั้ง 2 ข้อ

ก ถูก

ข ถูก

ผิดทั้ง 2 ข้อ

2.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

กำหนด∆ ABC มีมุม C เป็นมุมฉาก ข้อใดไม่ถูกต้อง

cosec A = sec B

tan A = cot B

tan A =1/tanC

sin2A + cos2 C = 1

3.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

ข้อใดต่อไปนี้ถูกต้องเกี่ยวกับตรีโกณมิติ

sin2 18° + sin2 72° = 1

sec218°+1 = tan2 18°

cosec2 A + cot2 A = 1

1-2sin2A = 0

4.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

ต่อไปนี้ข้อใดถูกต้อง

sin A/2 = 1/2 sinA

sin2A = (sinA)2

(sin A)/2 = sin (A/2)

sin(A+B) = sin A +sin B

5.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

sin30° +cos 30° +tan 30° มีค่าตรงกับข้อใด

(√3 +√2+1)/2

(3+5√3)/6

(3√3+1)/2

√3+√2

6.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

ข้อใดผิด

sin 30° = cos 60°

sec 19° = cosec 71°

tan 1° = cot 79°

tan A = tan B ,เมื่อA+B = 90°

7.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

ถ้า xtan2 45°-2xsec 60° +cot230°=0

-3

-1

1

3

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