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If sinA=1/2 find sin2A & cos2A...

If `sinA=1/2` find `sin2A` & `cos2A`

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The correct Answer is:
`=1/2`
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SUBHASH PUBLICATION-TRIGONOMETRY-Two Marks Questions With Answers
  1. If the arc of the same lengths in two circles subtend angles 65^(@) an...

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  2. A wheel makes 360 revolutions in one minute. Through how many radians ...

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  3. Find the degree measure of the angle subtended at the centre of a circ...

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  4. In a circle of diameter 40 cm, the length of a chord is 20 cm. Find t...

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  5. If in two cirlces arcs of the same length subtend angles 60^(@) and 75...

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  6. If sinA=1/2 find sin2A & cos2A

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  7. If sinA=3/5, find sin3A & cos3A, A is acute.

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  8. A wire of length 10 cm is bent so as to form an arc of a circle of rad...

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  9. A circular wire of radius 6 cm is cut & bent so as to form an arc of a...

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  10. Convert 40^(@),20' into radian measure.

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  11. Convert 6 radians into degree measure.

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  12. Find the radius of the circle in which a central angle of 60^(@) inter...

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  13. The minute hand of a watch is 1.5 cm long. How far foes its tip move i...

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  14. If the arc of the same lengths in two circles subtend angles 65^(@) an...

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  15. A wheel makes 360 revolutions in one minute. Through how many radians ...

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  16. Find the degree measure of the angle subtended at the centre of a circ...

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  17. In a circle of diameter 40 cm, the length of a chord is 20 cm. Find t...

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  18. If in two cirlces arcs of the same length subtend angles 60^(@) and 75...

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  19. If sinA=1/2 find sin2A & cos2A

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  20. If sinA=3/5, find sin3A & cos3A, A is acute.

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