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Find the length of an arc of circle of r...

Find the length of an arc of circle of radius 6cm subtending an angle of `15^(@)` at the centre.

A

`(pi)/(4)` cm

B

`(pi)` cm

C

`(pi)/(2)` cm

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
C
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MOTION-TRIGNOMETRIC RATIOS & IDENTITIES -Exercise 2(Level -I)
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  4. tan 7^@ cos 11^@ sin 27^@ is

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  5. If cotalpha + tanalpha = m and 1/cos alpha -cos alpha=n, then

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  6. If (3pi)/4<alpha<pi, t h e nsqrt(2cotalpha+1/(s in^2alpha)) is equal t...

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  7. If 2sec^2 alpha- sec^4 alpha-2 cosec^2 alpha+cosec^4 alpha=15/4 then t...

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  8. If 3 sin x+ 4 cos x =5 then 4 sin x -3 cos x is equal to

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  9. the value of cos0+cos(pi/7)+cos(2pi/7)+cos(3pi/7)+cos(4pi/7)+cos(5pi/7...

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  10. If x sin 45^(@) cos^(2)60^(@)=(tan^(2)60^(@) cosec 30^(@))/(sec 45^(@)...

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  11. If A+B+C=pi & cos A = cos B . Cos C then tan B . Tan C has the value e...

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  12. If 3 sin alpha=5 sin beta, then (tan((alpha+beta)/(2)))/(tan ((alpha-b...

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  13. If f( theta ) = sin ^(3)theta + sin ^(3)( theta + (2pi)/(3)) + sin ^(3...

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  14. If cosec A + cot A =11/2 , then tan A equal to

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  15. Prove that : (tan^(2)theta)/(1+tan^(2)theta)+(cot^(2)theta)/(1+cot^...

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  16. If cos alpha+ cos beta =a sin alpha + sin beta =b alpha - beta = 2 the...

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  17. The value of (1-tan^2 1 5^(@))/(1+tan^2 1 5^(@)) is

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  18. IF tan^2 theta=2 tan^2 phi +1 then find the value of cos 2 theta+sin^2...

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  19. If alpha in [(pi)/(2),pi] then the value of sqrt(1+ sin alpha)-sqrt(...

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  20. sqrt(2+sqrt(2+2cos 4 theta)), forall 0 lt theta lt pi//4 is

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