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Arithmetic Aptitude :: Trigonometry

Trigonometry - Section-1
  1.  Cosine Rule is also known as

    2. A.

    Cosine Area
    B.

    Sine triangle
    C.

    Cosine Triangle
    D.

    Cosine Formula

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  2.  Considering 0° < x < 180°, angle of sin x = 0.2385 is

    3. A.

    13.80° , 166.20°
    B.

    14° , 150°
    C.

    18.02° , 165.02°
    D.

    21° , 170.32°

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  3.  Formula for area of a triangle ABC is

    4. A.

    2ab sin C = 2bc sin A = 2ac sin B
    B.

    3/2ab sin C = 3/2bc sin A = 3/2ac sin B
    C.

    1/2ab sin C + 1/2bc sin A + 1/2ac sin B
    D.

    1/2ab sin C = 1/2bc sin A = 1/2ac sin B

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  4.  Considering Cosine rule, cos C is equal to

    5. A.

    a² - b² - c²⁄2bc
    B.

    a² + b² - c²⁄2ab
    C.

    2a + 2b - 2c⁄2ac
    D.

    2a² + 2b² + 2c²⁄2abc

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  5.  If cos 55° and sin 55° = 0.8 each then answer of cos 125° + 5 sin 55° is

    6. A.

    0.8
    B.

    2.4
    C.

    2.8
    D.

    3.2

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  6.  Number of dimensions a line can have is

    7. A.

    zero
    B.

    one
    C.

    infinite
    D.

    negative

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  7.  If cosine is 0.8 then value of acute angle is

    8. A.

    36.87°
    B.

    45°
    C.

    47.23°
    D.

    52.57°

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  8.  For any acute angle, sine A is equal to

    9. A.

    sin (90° - A)
    B.

    sin (180° - A)
    C.

    sin (180° + A)
    D.

    sin (2A - 180°)

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  9.  Line which is perpendicular to line passing through intersection point is called

    10. A.

    normal
    B.

    angular
    C.

    triangular
    D.

    trigonometrical

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  10.  Considering Cosine rule, a² + c² - b²⁄2ac is equal to

    11. A.

    cos A
    B.

    cos C
    C.

    cos B
    D.

    cos D

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