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cot 7 ( 1^(@))/( 2) =...

`cot 7 ( 1^(@))/( 2) =`

A

`sqrt( 1) + sqrt( 2) + sqrt( 3) + sqrt( 4)`

B

`sqrt( 2) + sqrt( 3) + sqrt( 4) + sqrt( 5)`

C

`sqrt( 2) + sqrt( 3) + sqrt(4) + sqrt( 6)`

D

`sqrt( 2) + sqrt( 3) + sqrt( 5) + sqrt( 6)`

Text Solution

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The correct Answer is:
C
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ML KHANNA-TRIGONOMETRY RATIOS AND IDENTITIES-PROBLEM SET (4) ( MULTIPLE CHOICE QUESTIONS)
  1. Find the value of cos 12^(@)+cos 84^(@)+cos 156^(@)+cos 132^(@)

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  2. sin 78^(@) - sin 66^(@) - sin 42^(@) + sin 6^(@) =

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  3. cot 7 ( 1^(@))/( 2) =

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  4. cot 22(1^(@))/( 2)

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  5. If tan theta = a//b, then b cos 2 theta + a sin 2 theta =

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  6. If sin alpha = 12//13 , ( 0 lt alpha lt pi //2) and cos beta = - ( 3)...

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  7. If tan theta =a - ( 1)/( 4a) , then sec theta - tan theta=

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  8. If theta and phi are angles in the first quadrant such that tan theta ...

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  9. The vlaue of tan 81^(@) - tan 63^(@) - tan 27^(@)+ tan 9^(@) is equ...

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  10. Find the angle theta whose cosine is equal to its tangent.

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  11. Prove that: t a nA+tan(60^0+A)-t a n(60^0-A)=3t a n3A

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  12. If tan alpha + tan ( alpha + ( pi )/( 3) ) + tan ( alpha + ( 2pi )/( 3...

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  13. Prove that :"sin"As in(60^0-A)s in(60^0+A)=1/4sin3A

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  14. If x is A.M. of tan "" ( pi )/( 9 ) and tan"" ( 5pi )/( 18) and y is A...

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

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  16. The value of 2tanpi/(10)+3secpi/(10)-\ 4cospi/(10) is 0 b. 1 c. sqrt(5...

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  17. The value of sin 50^(@) - sin70^(@) + sin 10^(@) is equal to

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  18. The value of sqrt3"cosec"20^@ - sec 20^@ is equal to

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  19. Expression (1)/(cos 290^(@)) + (1)/(sqrt(3) sin 250^(@)) equals

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  20. The value of (1)/( sin10^(@)) - ( sqrt( 3))/( cos 10^(@))=

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