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The value of "cosec"(-750^(@)) is...

The value of `"cosec"(-750^(@))` is

A

`2/sqrt(3)`

B

`-2`

C

`2`

D

`-2/sqrt(3)`

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The correct Answer is:
B
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ICSE-TRIGONOMETRIC FUNCTION-MULTIPLE CHOICE QUESTIONS
  1. A wheel make 450 revolutions per hour. The number of radians through w...

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  2. If sin x = 3/(5), then cos x is

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  3. The value of "cosec"(-750^(@)) is

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  4. The value of tan(-(15pi)/(4)) is

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  5. The range of 4+5 cos x is

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  6. The domain of 2 sin x cos x is

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  7. If x lies in III quadrant and tan x =5/(12), then sin x and cos x resp...

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  8. The value of 2"sin"^(2)(pi)/(6)+"cosec"^(2)(7pi)/(6)."cos"^(2)(pi)/(3)...

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  9. The value of "cos"((3pi)/2+x)."cos"(2pi+x)["cot"((3pi)/(2)-x)+"cot"(2p...

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  10. If sintheta+cosectheta=2, then "sin"^(2)theta+"cosec"^(2)theta is equa...

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  11. If f(x)="cos"^(2)x+"sec"^(2)x, then (i) f(x)lt1 (ii) f(x)=1 (iii...

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

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  13. Which of the following is not correct ?

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

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  15. The value of "tan"1^(@)."tan"2^(@)."tan"3^(@)......."tan"89^(@) is

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  16. The value of "tan"75^(@)-"cot"75^(@) is equal to

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  17. Which of the following is correct ?

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  18. The value of "tan"5A-"tan"3A-"tan"2A is equal to

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

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  20. The value of "cot"(pi/(4)+theta)."cot"(pi/(4)-theta) is (i) -1 (ii...

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