Class 11th Trigonometry Formulas Quiz
5 Questions
86 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

If sin(A) = 4/5 and A is an acute angle in a right-angled triangle, what is the value of cos(A)?

  • 3/5 (correct)
  • 4/3
  • -3/5
  • -4/3

What is the value of sin(-30°)?

  • -1
  • 0.5
  • -0.5 (correct)
  • 1

Which of the following identities represents the relationship between sin(A+B) and sinA, sinB, cosA, cosB?

  • sin(A+B) = sinAcosB + sinBcosA
  • sin(A+B) = cosAcosB - sinAsinB
  • sin(A+B) = cosAcosB + sinAsinB (correct)
  • sin(A+B) = sinAcosB - sinBcosA

If cot(X) = -3/4, what is the value of tan(-X)?

<p>-4/3 (B)</p> Signup and view all the answers

What is the value of sin2(45°)?

<p>1 (A)</p> Signup and view all the answers

Flashcards

sin(A) = 4/5, find cos(A)

In a right-angled triangle, if sin(A) is 4/5, then cos(A) is 3/5.

sin(-30°)

The sine of a negative angle is the negative of the sine of the positive angle.

sin(A+B) identity

sin(A + B) = sinAcosB + cosAsinB

cot(X) = -3/4, find tan(-X)

The tangent of a negative angle is the negative of the tangent of the positive angle.

Signup and view all the flashcards

sin²(45°)

The value is 1/2

Signup and view all the flashcards

Study Notes

Trigonometric Identities and Values

  • If sin(A) = 4/5 and A is an acute angle in a right-angled triangle, then cos(A) = √(1 - (4/5)^2) = 3/5
  • The value of sin(-30°) is -1/2
  • The relationship between sin(A+B) and sinA, sinB, cosA, cosB is sin(A+B) = sinAcosB + cosAsinB
  • If cot(X) = -3/4, then tan(-X) = 1/(-3/4) = -4/3
  • The value of sin2(45°) is sin(2*45°) = sin(90°) = 1

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Quiz Team

Description

Test your knowledge of trigonometry formulas with this quiz covering sine, cosine, tangent, cotangent, secant, cosecant, and various trigonometric identities.

More Like This

Use Quizgecko on...
Browser
Browser