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If costheta =-1/2 and 0 lt theta lt 360^...

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

A

`120^(@), 210^(@)`

B

`120^(@),300^(@)`

C

`60^(@), 240^(@)`

D

`120^(@), 240^(@)`

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The correct Answer is:
D
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AAKASH INSTITUTE ENGLISH-TRIGNOMETRIC FUNCTIONS -Assignment section-A (Objective Type Questions (One option is correct))
  1. The circular wire of diameter 10 cm is cut and placed along the circum...

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

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

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

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

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

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

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  8. If tantheta=1/(2) and tanphi=1/(3), then the value of (theta+phi) is

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  9. The value of cot((pi)/(4)+theta)cot((pi)/(4)-theta) is

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

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  11. The value of "sin"(45^(@)+ theta)-"cos(45^(@) - theta) is (i) 2costh...

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

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

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

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

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  16. The value of sin 50^(0)-sin 70^0+sin 10^0 is equal to a. adot\ 0 b. 1 ...

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  17. The value of sinpi/(14)sin(3pi)/(14)sin(5pi)/(14)sin(7pi)/(14)sin(9pi)...

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

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

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  20. The value of "cos"1^(@)."cos"2^(@)."cos"3^(@)......."cos"179^(@) is

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