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If tan theta =(1)/(sqrt(7)) and theta ...

If ` tan theta =(1)/(sqrt(7)) and theta ` is an acute angle , then `("cosec"^(2) theta - sec^(2) theta )/( "cosec"^(2) theta + sec^(2) theta = `

A

`3/4`

B

`1/2`

C

2

D

`5/4`

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AAKASH SERIES-TRIGONOMERTIC RATIOS-EXERCISE - I
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  2. If Tan theta = (2 x(x+1))/(2x+1) then Sin theta =

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  3. If tan theta =(1)/(sqrt(7)) and theta is an acute angle , then ("cos...

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  8. log10 tan1^@+log10 tan2^@+log10 tan3^@+......+log10 tan89^@=..........

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  11. cos. (pi)/(7) + cos. (2pi)/(7) + cos. (3pi)/(7) + cos. (4pi)/(7) + cos...

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  12. If A,B,C,D are the angles of a quadrilateral then cos""((A+B)/(2))+ ...

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  13. If A,B,C,D are the angles of a cyclic quadrilateral then cos A + cos...

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  14. If sum(i=1)^(n)sin theta(i)=n then cos theta(1) + cos theta(2) + ...+c...

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  15. If sin theta + cosec theta =2 then sin^(n) theta + cosec^(n) theta =

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  16. (1+sec theta - tan theta)/(1+sec theta + tan theta)=

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  17. If sec theta + tan theta = 1.5 then theta lies in the quadrant

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  18. If x=sin 130^(@) + cos 130^(@) then

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  19. If u(n) = cos^(n) theta + sin^(n) theta then 2u(6)-3u(4)=

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  20. 3[sin^(4)(3pi//2-alpha)+sin^(4)(3pi+alpha)]-2[sin^(6)(pi//2+alpha)+sin...

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