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If pi lt alpha lt 2pi then (1)/(Sin alph...

If `pi lt alpha lt 2pi` then `(1)/(Sin alpha - sqrt(cot^(2)alpha -cos^(2) alpha))=`

A

`sin alpha`

B

`- sin alpha`

C

`(1)/(sin alpha)`

D

1

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AAKASH SERIES-TRIGONOMERTIC RATIOS-EXERCISE- II
  1. If sqrt((1+sin A)/(1-sin A))=sec A +tan A, then the quadrants in which...

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  2. If pi/2 lt theta lt pi then sqrt((1-sin theta)/(1+sin theta))+sqrt((1+...

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  3. If pi lt alpha lt 2pi then (1)/(Sin alpha - sqrt(cot^(2)alpha -cos^(2)...

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  4. ((sqrt(3) + 2 cosA)/( 1-2 sin A ))^(-3) + ((1+ 2 sin A )/( sqrt(3)-2 c...

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  5. If 2 sin x + 5 cos y + 7 sin z = 14 then 7 tan. (x)/(2) + 4 cos y - 6 ...

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  6. If (sin alpha + "cosec" alpha )^(2) + ( cos alpha + sec alpha )^(2)=k+...

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  7. If Sin theta + Cos theta = sqrt(3) Cos theta then 2 Cos theta - Sin ...

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  8. If a cos theta - b sin theta = c then a sin theta + b cos theta=

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  9. If a Sin theta + b Cos theta = c then (a-b tan theta)/(b + a tan theta...

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  10. If sin x + cos x =a then |sin x - cos x|=

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  11. If a sec theta + b tan theta = c then (a tan theta + b sec theta)^(2)=

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  12. If sin theta + cos theta = a " then " sin^(4) theta + cos^(4) theta =

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  13. If cosec^(6) theta - cot^(6) theta = a cot^(4) theta + b cot^(2) theta...

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  14. If a=x cos^(2) alpha + ysin^(2) alpha " then " (x-a)(y-a)+(x-y)^(2)si...

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  15. If m= a Cos^(3) theta + 3a Cos theta Sin^(2) theta and n=a Sin^(3) the...

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  16. If Cosec theta - Sin theta = a^(3), Sec theta - Cos theta = b^(3) th...

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  17. If "cosec " theta - sin theta = m, sec theta - cos theta =n , " then ...

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  18. If cot theta + tan theta = m , sec theta - cos theta = n " then " (m^...

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  19. If (cos^(2) theta)/(a) = (sin^(2) theta)/(b) then (cos^(4) theta)/(a) ...

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  20. Match the following {:("parametric equation","Cartesian equation"),(...

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