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If in two circles, arcs of the same leng...

If in two circles, arcs of the same length subtend angles `60^(@)` and `75^(@)` at the centre, find the ratio of their radii.

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The correct Answer is:
`r_(1):r_(2)=5:4`
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NCERT TAMIL-TRIGONOMETRY-EXERCISE 3.2
  1. Express each of the following angles in radian measure: 30^(@)

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  2. Express each of the following angles in radian measure: 135^(@)

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  3. Express each of the following angles in radian measure: -205^(@)

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  4. Express each of the following angles in radian measure: 150^(@)

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  5. Express each of the following angles in radian measure: 330^(@)

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  6. Find the degree measure corresponding to the following radian measure...

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  7. Find the degree measure corresponding to the following radian measure...

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  8. Find the degree measure corresponding to the following radian measure...

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  9. Find the degree measure corresponding to the following radian measure...

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  10. Find the degree measure corresponding to the following radian measure...

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  11. What must be the radius of a circular running path, arround which an a...

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  12. In a circle of diameter 40 cm, a chord is of length 20 cm. Find the le...

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  13. Find the degree measure of the angle subtended at thecentre of circle ...

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  14. What is the length of the arc intercepted by a central angle of measur...

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  15. If in two circles, arcs of the same length subtend angles 60^(@) and 7...

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  16. The perimeter of a ceratain sector of a circle is equal to the length ...

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  17. An airplane propeller rotates 1000 times per minute. Find the number o...

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  18. A train is moving on a circular track of 1500 m radius at the rate of ...

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  19. A circular metallic plate of radius 8 cm and thickness 6 mm is melted...

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