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cot(pi/4+theta)cot(pi/4-theta)"i s"...

`cot(pi/4+theta)cot(pi/4-theta)"i s"`

A

`-1`

B

0

C

1

D

Not defined

Text Solution

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The correct Answer is:
C
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AAKASH INSTITUTE-TRIGNOMETRIC FUNCTIONS -Assignment section-A (Objective Type Questions (One option is correct))
  1. Calculate the value of (i) sin 15^(@) " "(ii) cos 15^(@)" "(...

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  2. If tan theta=1/2 and tan phi =1/3, then the value of theta + phi is

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  3. cot(pi/4+theta)cot(pi/4-theta)"i s"

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  4. The value of sin50^(@) - sin70^(@)+sin10^(@) is equal to

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  5. The value of sin(45^(@)+theta) - cos(45^(@)-theta) is

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  6. If cos(alpha+beta)=(4)/(5) and sin(alpha-beta)=(5)/(13) , where alpha ...

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  7. The value of (1-tan^(2)15^(@))/(1+tan^(2)15^(@)) is

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  8. If (1+tantheta)(1+tanphi)=2, then theta + phi=

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  9. Find the value of cos 12^(@)+cos 84^(@)+cos 156^(@)+cos 132^(@)

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  10. The value of sin 50^(@) - sin70^(@) + sin 10^(@) is equal to

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  11. The value of sinpi/18+sinpi/9+sin(2pi)/9+sin(5pi)/18 is

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  12. The value of sin""(pi)/(10)sin""(13pi)/(10) is

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  13. In a triangleABC, if sinA - cosB = cos C, then the measured of angleB ...

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  14. The value of cos1^(@) cos 2^(@) ..............cos179^(@) is

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  15. 2cos(pi/13)cos(9pi/13)+cos(3pi/13)+cos(5pi/13)=0

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  16. If sintheta +costheta =1, then the value of sin2theta is equal to

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  17. If tan A=1/2 and tan B=1/3, then tan(A +B) is equal to

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  18. The minute hand of a watch is 3cm long. How far does its tip move in 2...

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  19. If sintheta=(-4)/(5) and theta lies in third quadrant, then the value...

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  20. The value of tan75^(@) =

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