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Introduction to trigonometry

Class 10 · Mathematics · 6 questions

Name: ____________________   Date: ____________

  1. sin 30 degrees equals:

    • A 0
    • B 1/2
    • C the square root of 3 over 2
    • D 1

  2. cos 60 degrees equals:

    • A 1
    • B 0
    • C the square root of 3
    • D 1/2

  3. tan 45 degrees equals:

    • A 0
    • B 2
    • C 1
    • D undefined

  4. sin squared theta plus cos squared theta equals:

    • A 2
    • B 0
    • C tan theta
    • D 1

  5. In a right triangle, sin of an angle equals:

    • A Perpendicular / hypotenuse
    • B Hypotenuse / base
    • C Base / hypotenuse
    • D Perpendicular / base

  6. A ladder 10 m long leans against a wall making 30 degrees with the ground. How high does it reach?

    • A 5 m
    • B 10 m
    • C 20 m
    • D 8.7 m

Answer key

1. B, 2. D, 3. C, 4. D, 5. A, 6. A

  1. sin 30 = 1/2.

  2. cos 60 = 1/2.

  3. tan 45 = 1.

  4. This is the basic trigonometric identity.

  5. sin = opposite / hypotenuse.

  6. Height = 10 x sin 30 = 5 m.