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(1)/(sec^(4) alpha ) +(1)/("cosec"^(4) a...

`(1)/(sec^(4) alpha ) +(1)/("cosec"^(4) alpha ) +(2)/(sec^(2) alpha + "cosec"^(2) alpha )=`

A

0

B

1

C

`sin^(2) alpha`

D

`cos^(2)alpha`

Text Solution

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The correct Answer is:
B
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AAKASH SERIES-TRIGONOMERTIC RATIOS-PRACTICE EXERCISE
  1. If x=a("cosec" theta + cot theta ) , y=b( " cosec " theta - cot theta ...

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  2. (1+cosec theta - cot theta)/(1+cosec theta + cot theta)=

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  3. (1)/(sec^(4) alpha ) +(1)/("cosec"^(4) alpha ) +(2)/(sec^(2) alpha + ...

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  4. ( cos^(3) A + sin^(3) A )/( cos A + sin A ) + (cos^(3) A - sin^(3)A)/(...

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  5. If cosec theta + cot theta = 1//3 then cosec theta - cot theta =

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  6. If cosec A = 4x + (1)/(16x) then cosec A + cot A =

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  7. If tan theta = 5 a - (1)/(20a) then sec theta + tan theta =

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  8. If 1+4 tan theta = 4 sec theta then cos theta=

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  9. 1-(sin^(2) theta)/(1+cos theta) + (1+cos theta)/(sin theta) - (sin the...

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  10. If sin theta, cos theta, tan theta are in GP then cos^(9)theta + cos^(...

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  11. (1+ tan alpha tan beta)^(2) + (tan beta - tan beta)^(2)=

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  12. If 2 Cos^(2)B - 1 = Tan^(2) A then Cos A Cos B =

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  13. (sin^(2)alpha)/(1+cot^(2) alpha) + (tan^(2)alpha)/((1+tan^(2) alpha)^(...

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  14. If (2 sin theta )/(1+ cos theta + sin theta )=x, find the value of (1...

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  15. If Sin^(2) theta + 3 Cos theta -2 =0 then Cos^(3) theta + Sec^(3) thet...

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  16. If cos^(2) x + cos^(4) x =1 then tan^(2) x + tan^(4) x=

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  17. If sin theta + sin^(2) theta =1 then cos^(4) theta + cos^(8) theta + 2...

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  18. If sqrt((1+cos alpha)/(1-cos alpha))=cosec alpha + cot alpha, then the...

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  19. If cos theta - sin theta = sqrt(2) sin theta " then " cos theta + si...

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  20. If Cos theta - Sin theta = sqrt(2) Cos theta then Cos theta + Sin thet...

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