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The value of sin 50^(@) - sin70^(@) + si...

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

A

1

B

0

C

`1/2`

D

2

Text Solution

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The correct Answer is:
B
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AAKASH INSTITUTE-TRIGNOMETRIC FUNCTIONS -Assignment section-A (Objective Type Questions (One option is correct))
  1. If (1+tantheta)(1+tanphi)=2, then theta + phi=

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

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

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

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

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

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

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  8. 2cos(pi/13)cos(9pi/13)+cos(3pi/13)+cos(5pi/13)=0

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

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

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

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

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  13. The value of tan75^(@) =

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  14. If 1,omega , omega^2 are the cube roots of unity , then Delta=|(1,ome...

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  15. The value of 2sinA cos^(3)A -2sin^(3)A cosA is

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  16. If tanalpha=(sqrt(3)+1)/(sqrt(3)-1), then the expression cos 2alpha +(...

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  17. If sin^2 theta=1/4 , then the value of theta is

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  18. The solution of the equation cos^2theta+sintheta+1=0 lies in the inter...

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  19. The general solution of tan3x=1 is

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  20. If sin theta =sqrt(3) cos theta, -pi lt theta lt 0, then the value of ...

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