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If tantheta=3 and theta lies in third qu...

If `tantheta=3` and `theta` lies in third quadrant then `sintheta=`

A

`1/sqrt(10)`

B

`-1/sqrt(10)`

C

`-3/sqrt(10)`

D

`3/sqrt(10)`

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. Whch of the following is correct?

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  2. The sin theta + "cosec" theta =2, then: sin^(2)theta + "cosec"^(@)thet...

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  3. If tantheta=3 and theta lies in third quadrant then sintheta=

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  4. If tantheta =-4/3, then sin theta is

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  5. If A lies in the second quadrant and 3tanA + 4=0, then find the value ...

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  6. The circular wire of diameter 10 cm is cut and placed along the circum...

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  7. The value of (secA + tanA-1) (sec A -tanA+1) -2tanA is equal to

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  8. If costheta =-1/2 and 0 lt theta lt 360^(@), then the value of theta a...

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  9. sin10 5^(@)+cos10 5^(@)=

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  10. If sintheta(1)sintheta(2)+sintheta(3), then cos theta(1)+cos theta(2)+...

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  11. The value of cos 10^@ - sin 10^@ is

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  12. Calculate the value of (i) sin 15^(@) " "(ii) cos 15^(@)" "(...

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

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

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

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

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

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

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

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

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