Question # 1

The area of a sector of a circular region of radius r with length of the arc of the sector equal to s is-----------:

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rΘ

rs

180° = _____________:

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π radians

To convert any angle in radians into degrees, we multiply the measure by:

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(1 - sin²Θ) (1 + tan²Θ) =

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0

1

Θ

-1

If sin α < 0 and cos α > 0, then α lies in:

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I

II

III

IV

cos⁴Θ - sin⁴Θ =

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sin 2Θ

cos 2Θ

tan 2Θ

sec 2Θ

The quadrant of an angle Θ is determined by its:

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sign

value

ratio

magnitude

In circular system the angle is measured in:

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radians

degrees

degrees, minutes

degrees, seconds

(1 - cos²Θ) (1 + cot²Θ) =

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tan²Θ

0

1

-1

The angle between 0° and 360° and co-terminal with - 620° is:

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100°

200°

300°

320°

If cosec Θ > 0 and cot Θ < 0, then terminal arm of the angle lies in:

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I

II

III

IV

To convert any angle in degrees into radians, we multiply the measure by:

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The number of radius in the angle subtended by an arc of a circle at the center =

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radius × arc

radius - arc

- 72° = ___________________:

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none of these

If s denotes the length of the arc intercepted on a circle of radius r by a central angle of α radians, then:

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s = rα

s = r + α

none of these

If sinΘ <0, cosΘ<0 then the terminal arm of the angle lies in quadrant:

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I

II

III

IV

1° is equal to:

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In a circle of radius r, an arc of length kr will subtend in angle of __________ radians at the center:

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s

k

r

Θ

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The system of measurement in which the angle is measured in degrees, and its sub-units, minutes and seconds is called the:

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circular system

sexagesimal system

decimal system

degree system

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