Two acute angles in a right triangle add to 90°. If one acute angle is 20°, what is the other?
Correct answer(s):
- 70°
Subject
Trigonometry
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Quizzes in Trigonometry
If angle A = 15° and angle B = 75° in a right triangle, what is true about sin A and cos B?
Correct answer(s):
- They are equal
Two acute angles in a right triangle add to 90°. If one acute angle is 15°, what is the other?
Correct answer(s):
- 75°
If angle A = 10° and angle B = 80° in a right triangle, what is true about sin A and cos B?
Correct answer(s):
- They are equal
Two acute angles in a right triangle add to 90°. If one acute angle is 10°, what is the other?
Correct answer(s):
- 80°
What is the standard value of tan 90°?
Correct answer(s):
- undefined
What is the standard value of sin 90°?
Correct answer(s):
- 1
What is the standard value of tan 60°?
Correct answer(s):
- √3
What is the standard value of cos 60°?
Correct answer(s):
- 1/2
What is the standard value of sin 60°?
Correct answer(s):
- √3/2
What is the standard value of tan 45°?
Correct answer(s):
- 1
What is the standard value of cos 45°?
Correct answer(s):
- √2/2
What is the standard value of sin 45°?
Correct answer(s):
- √2/2
What is the standard value of tan 30°?
Correct answer(s):
- 1/√3
What is the standard value of cos 30°?
Correct answer(s):
- √3/2
What is the standard value of sin 30°?
Correct answer(s):
- 1/2
What is the standard value of tan 0°?
Correct answer(s):
- 0
What is the standard value of cos 0°?
Correct answer(s):
- 1
What is the standard value of sin 0°?
Correct answer(s):
- 0
In a right triangle, for a chosen acute angle, the opposite side is 21 and the adjacent side is 20. What is tan of the angle?
Correct answer(s):
- 21/20