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The length of an arc, which subtends an ...

The length of an arc, which subtends an angle of `30^(@)` at the centre of the circle of radius 42 cm is _________

A

22 cm

B

44 cm

C

11 cm

D

`(22)/(7)`cm

Text Solution

Verified by Experts

The correct Answer is:
A
Use ` l=rxx theta `, where ` theta ` is in radians.
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PEARSON IIT JEE FOUNDATION-TRIGONOMETRY -Level 1
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  9. In a DeltaABC, cos((A+B)/(2))=

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  10. sin^(4) theta - cos^(4) theta=

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  11. If P:Q= tan 2A: cos A and Q: R= cos 2A: sin 2A, then P:R is

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  12. If A=sin theta+ cos theta and B=sin theta - cos theta, then which of t...

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  13. If cot(A-B)=1 and cos (A+B)=(1)/(2), then find B

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  14. Find the measure of angle A, if (2 sin A +1)(2 sin A-1)=0

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  16. The simplified value of sin^(4)alpha+cos^(4)alpha+(1)/(2) sin^(2) 2 al...

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  17. sqrt(((1+sin2theta))/(1-cos^(2)theta))["where" theta in [0,(pi)/(4)]]=

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  18. If A and B are complementary angles, then the value of (sin^(2)A + sin...

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  19. Find the value of 4(sin^(4)30^(@)+cos^(4)30^(@))-3(cos^(2)45^(@)+sin^(...

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